In this task, you are given news articles and you need to generate a highlight, i.e., a short summary, with a maximum length of 10 lines.

Input: Consider Input: (CNN)  -- Low visibility caused by mist and sand created poor flying conditions for the pilot of an Afriqiyah Airways flight that crashed just before landing in Tripoli, Libyan sources with knowledge of the investigation said Saturday. The plane, an Airbus A330-200, originated in Johannesburg, South Africa, and was at the end of its nearly nine-hour flight when it crashed Wednesday. All but one of the 104 passengers on board were killed. The sources said that as the pilot approached Tripoli International Airport, he took the plane off auto-pilot hoping to manually land the aircraft. He realized he was in trouble and tried to pull the plane up and turn the auto-pilot back on to give it another try, the sources said. But the effort was too late and the plane slammed violently into the ground, explaining the condition of the wreckage and damage to the plane's tail at the crash site, the sources said. An investigation into the crash is under way, and authorities are reviewing the aircraft's flight data recorder. Meanwhile Ruben van Assouw, the 9-year-old sole survivor of the plane crash, has returned home to the Netherlands. He suffered multiple fractures to his legs and underwent surgery at Al Khadra Hospital, said a doctor at the hospital who declined to give her name. Both of Ruben's parents and a brother were killed in the crash, a Dutch foreign ministry representative said. Ruben's family issued a statement Friday expressing gratitude to people who have helped them, such as Libyan hospital professionals and Dutch envoys, as well as the outpourings of sympathy from citizens in both countries. The family also thanked "the vast majority of the Dutch media for respecting our privacy." The family, which will raise Ruben, said the boy knows that his parents and brother were killed. "Considering the circumstances, Ruben is doing fine. He is sleeping a lot; now and then he wakes up and is then lucid," the family said in the statement. "He has drunk a little, and has seen the flowers and cuddly toys." Ruben's family said it has to deal with "two kinds of grief" -- the sorrow the boy is enduring and the sadness over the loss of the other family members. "The coming period will be very difficult for us," the family said. "We hope that all the media will respect our privacy." More than two-thirds of the passengers killed in the plane crash were Dutch, the ministry said. Passengers from Libya, South Africa, Belgium, Austria, Germany, France, Zimbabwe and Britain were also among the victims, the airline said on its Web site. The Dutch foreign ministry said Friday it is sending more experts to Tripoli to help Libyan authorities and Dutch colleagues identify the victims.

Output: Sources: Mist and sand created poor flying conditions for the pilot of crashed plane .
Family says 9-year-old sole survivor knows his immediate family were killed in plane crash .
Dutch foreign ministry sending experts to Tripoli to help authorities identify victims .


Input: Consider Input: (CNN) -- As Michael Ballack finally calls time on his 17-year professional career, German football can bask in the knowledge they boast the best two teams in Europe. But while the Champions League final between eventual winners Bayern Munich and Borussia Dortmund showcased all that is good about German football, the 36-year-old has told CNN the domestic game may suffer as a result. As well as the continent's most glittering club prize, Bayern won the German Cup and the Bundesliga by an incredible 25 points. Dortmund, who won the championship in the previous two seasons, were their nearest challengers, and the pair have accounted for five of the last six titles. Ballack told CNN World Sport that duopoly could be bad news for the Bundesliga, if Germany's top league starts to resemble Spain, where Barcelona and Real Madrid reign supreme. "In Germany we have a situation now where Dortmund and Bayern are far, far more away from the other teams, and that's what we don't want to see in the Bundesliga," said Ballack, who has 98 Germany caps to his name. "We have a little bit of a similar situation in Spain with Barca and Madrid, and in the (English) Premier League it's more open. "These last years we could see a lot of surprises, and from the bottom (a team) could beat the first one. It was exciting and the Bundesliga was good to see. Bayern Munich is heading away a little bit so we will see how it develops in the future." Bayern's historic treble confirmed them as the dominant force in Germany, and with their considerable financial muscle, they are already planning on extending their superiority over the rest. Shortly before the end of the season it was announced that Mario Gotze -- one of Dortmund's best players -- would be joining Bayern for $49 million, with striker Robert Lewandowski expected to make a similar move in the coming weeks. While the man who masterminded Bayern's success in 2013, Jupp Heynckes, is retiring, his replacement is Pep Guardiola, who won a total of 14 trophies in four years as coach of Barcelona. So how can the other teams, Dortmund included, keep up with the Bayern juggernaut? "With money," Ballack jokes. "No, it's difficult for the weaker teams to close the gap because like I said, the bigger teams still invest, and they could invest. "If you take Bayern Munich, they just bought six months ago Javi Martinez for $52 million, now Gotze for $49 million. So that's a lot of money and it's not possible I think to do it for any other club in Germany. "It is just Bayern Munich who has this good position, and from a financial point really good, and really healthy. And that's important. "Dortmund as well, they are trying to close the gap between them and the other teams, but of course Bayern Munich are far away from the others." Guardiola comes with a reputation as one of the game's leading coaches, but given the standards Bayern set this season, Ballack thinks the Spaniard will struggle to improve the team. "I think sometimes when you come in (as a new coach) you think 'I have to change something.' But if you see this Bayern Munich team now, I can't really see where he needs to change. "Obviously he has his own idea of football and how he wants to play. I'm sure he's seen a lot of games, if not all, in the last six months from Bayern Munich, and he knows there's not much to improve. "It's an incredible level that they've played in the last six months or the last year. And like I said before, the little details. Maybe change something just to change something because you want to play your own style. "But on the other side, like I said, you can't really change a lot because everything works well. But I'm sure he's a smart guy and a good coach, and he will handle it." Ballack's farewell match in Leipzig saw a World XI, coached by new Chelsea manager Jose Mourinho, take on a Germany XI, coached by Rudi Voller. Former teammates Didier Drogba, now at Galatasaray, Ukrainian Andriy Shevchenko, Bayern captain Philipp Lahm and seven-time Formula One world champion Michael Schumacher, among others, took part. Mourinho managed Ballack at Chelsea and has now returned to London for a second stint after his three-year tenure at Real Madrid ended in disappointment. One of the Portuguese's first engagements will be to renew his rivalry with Guardiola when Chelsea play Bayern in the UEFA Super Cup at the end of August. And Ballack, who won one Premier League title and two FA Cups in his four years at Chelsea, and three Bundesliga crowns with Bayern, says his time with Mourinho was a golden spell in his career. "He has a fantastic reputation at (Chelsea), also I think in England. He's a charismatic manager and I really enjoyed working with him for two years and most of the players as well I can say. "I think (his image) is not always what you see in the media. What we have as players, is another picture. And that's the picture in the dressing room. "It's the daily work with him on the pitch and his speeches when he talks to us. And that's what I can say is special, because his attitude, his personality, if he comes in front of the group if he talks to us. "What's fantastic is he brought the team behind him. And that shows not just in Chelsea, he also adapted really well on the international (stage). He worked in Italy, he worked in Spain, and everywhere he had success."

Output: Michael Ballack tells CNN the dominance of Dortmund and Bayern is bad for Germany .
Two sides contested Champions League final and are streets ahead in Bundesliga .
The 36-year-old says new Bayern coach Pep Guardiola has a tough job to improve the team .
Ballack played a farewell match in Leipzig as his 17-year career officially came to an end .


Input: Consider Input: Call them drones; call them toy airplanes with digital cameras dropped into their girths. Either way, South Korean defense officials said on Friday they were sure that they came from North Korea and that they were up to no good. Three diminutive single-engine unmanned propeller planes that look like they could have come from a hobby shop were found on the ground in March and April in parts of the South near the border with the northern Communist regime. Though the low-tech buzzers don't seem to represent a major danger, they come in the shadow of North Korean missile launches and the impending countdown to the test of a nuclear device. And they made it through South Korean air defenses. Ministry of National Defense officials in Seoul immediately suspected that the sky-blue colored fliers belonged to Pyongyang. They formed an investigation team with the United States in mid-April to analyze the "travel log file" and photos taken by the drones and announced the results on Friday. Scientists found a "smoking gun that all three were sent from North Korea and are programmed to return to North Korea," South Korean defense spokesman Kim Min-soek said. Photos the drones took along on their journey corroborate their flight path, he said. Precarious cargo . Had the mechanical carrier pigeons made it back home, they would have delivered precarious cargo, but it would have been far from precious. Japanese-made digital cameras, which look like they could be of the consumer variety, were inserted into the bellies of the drones and had taken aerial photos of the South from around the border region. All three were programmed to fly over military facilities, and two of them had images of targets of military interest -- strategically important islands near the demilitarized zone, and the Blue House, residence and office of South Korea's President Park Geun-hye. Images from the third drone were not available to South Korean investigators. A wild ginseng digger had stumbled upon the plane and had deleted its memory card so he could use it himself, the Korea Times reported. The planes were not capable of transmitting images back to North Korea in real time, and the photos themselves were no better than what one might see on a service akin to Google Earth, Kim said in a previous briefing. Limited capabilities . There is little danger the drones could have made it far into South Korea. The type of drone is not used for long-range missions, a defense analyst said. Instead they're better suited to see what the enemy is up to on the other side of a hill or wall. "It has quite a small range, it doesn't have very long endurance so it would only be up there for a few hours. You would use those to see what the other guys are doing in a battlefield environment," said James Hardy, the Asia Pacific editor of IHS Jane's Defence Weekly magazine. "They're very much closely built off a remote-controlled aircraft that you can buy in a toy store. They're just a militarized version of that," Hardy said. The Korean drones are nowhere near as sophisticated as those used by the United States in Pakistan, Yemen and Afghanistan, he said. They would also not make much of a weapon, if someone decided to stuff explosives into them, Kim has said. "Even if they are to be used for future attacks, (they) can only carry 2-3 kilograms of TNT and cannot cause huge damage." North Korea has flaunted similar, larger UAVs at military parades in recent years, and some of them have been spiked with explosives, Hardy said. Video footage shows North Korean exercises using them as missiles, but it's an expensive way to build a bomb, he said. And it could only take out a single vehicle or ship. 'Tis the season . Spring is traditionally a time of high tensions between Pyongyang on the one side and Seoul and Washington on the other. Annual U.S.-South Korean joint military drills, that ended on April 7, drew criticism from North Korea, which views the exercises as "dress rehearsals for invasion," according to analyst James Person from the Woodrow Wilson Center. In March, Pyongyang fired two mid-range ballistics missiles off its eastern coast, in an apparent response to the drills. Days later, the two sides fired hundreds of shells across the Northern Limit Line, their disputed maritime border. The shells were shot into the sea, not at hard targets. North Korea also warned it was preparing to test another nuclear device. "It's all good stuff because it allows the North Koreans to do something provocative and slightly annoying which might embarrass South Koreans, but it's not provocative enough to create a proper military response," Hardy said. Slipping through . The drones would fit well into that category, since they slipped through South Korean air defenses. They are made of polycarbonate, which is difficult to detect with radar, according to South Korea's Yonhap news agency. They fly at an average speed of about 110 km per hour (68 mph) at an altitude of 1.3 km (.8 miles). They were launched in North Korea from three locations, South Korea's defense ministry said: Near the Kaesong area, 27 kilometers southeast of Haeju and 17 kilometers from Pyonggak. South Korea's defense ministry called the intrusion by the drones a violation of the truce that ended the bloody conflict between North and South Korea in 1953. Kim said Seoul will send a warning via the United Nations to Pyongyang and tighten air defenses as a response to the drones.


Output: Three diminutive single-engine unmanned propeller planes were found in March and April .
They look like hobby shop model airplanes with consumer cameras shoved into them .
They don't have strong military or spy capabilities, but they made it through air defenses .
Spring is typically a time of high provocations between North and South Korea .