instruction:
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.
question:
BOSTON, Massachusetts (CNN)  -- The operator of a trolley that rear-ended another trolley should have been able to see the other vehicle was stopped 480 feet ahead, a federal investigator said Monday. Passengers walk past firefighters at a Green Line station in Boston after the trolley collision Friday evening. The trolley driver has told investigators he was text messaging during Friday night's collision, which injured 20 people. The Massachusetts Bay Transportation Authority, which previously had banned operators from using cell phones and other portable devices, now has told employees to leave the devices at home while on duty, National Transportation Safety Board member Debbie Hersman said Monday. Hersman also noted investigators have determined that the operator may have missed some crucial indications of a stopped trolley ahead on the tracks.  Watch new transit rule on cell phones » . "There were several signals -- two green signals, a yellow signal and a red signal -- coming out of the station, and the point of collision occurred 80 feet past that red signal," Hersman said. "We did a site-distance test, and we know that the operator had the ability to see the trolley stopped in front of him 480 feet in advance of the collision." Boston officials said over the weekend that the trolley operator was using his cell phone. Numerous media outlets, including CNN's Boston affiliates, have identified the driver as 24-year-old Aiden Quinn. "The operator of the striking train was interviewed at the hospital by two detectives," said MBTA general manager Daniel Grabauskas. "He admitted that he was texting at the time of the accident." The operator told detectives that, when he looked up, "it was too late as he applied the brake and the train struck the other trolley," Grabauskas said. He described himself as "outraged." "We have reinforced for a number of years that the use of cell phones or any other kinds of electronic devices while operating a train or a bus is absolutely prohibited," Grabauskas said. Though the investigation is ongoing, he said, the two-year employee will be fired if his version of events is confirmed. None of the injuries was considered life-threatening, the MBTA said. The collision happened at 7:18 p.m. ET Friday as the Green Line trains were traveling between the Park Street and Government Center stations in downtown Boston. Both trains were traveling westbound when one train rear-ended the second, an MBTA official said. A train operator also was text messaging last year in a California train crash that killed 25 people. CNN's Rob Frehse and Gary Bender contributed to this report.
answer:
Federal investigator says Boston trolley crashed 80 feet past a red light .
Trolley driver told investigators he was texting during wreck that injured 20 people .
Drivers already banned from using phones; authority now says keep them at home .


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Robert, Louisiana (CNN) -- Three attempts to pump mud and 16 tries to stuff solid material into a breached Gulf of Mexico oil well failed to stop the flow, top BP executives said Saturday, and engineers and executives with the oil giant have decided to "move on to the next option." That option: Place a custom-built cap to fit over the "lower marine riser package," BP chief operation officer Doug Suttles said. BP crews were already at work Saturday to ready the materials for that option, he said. Suttles said three separate pumping efforts and 30,000 barrels of mud -- along with what chief executive officer Tony Hayward described as "16 different bridging material shots" -- just didn't do the trick. "We have not been able to stop the flow," a somber Suttles told reporters. " ... Repeated pumping, we don't believe, will achieve success, so we will move on to the next option." Suttles and other officials said that the "top kill" attempt to stop the flow did so -- but only as long as they were pumping. When the pumping stopped, the oil resumed its escape. And Coast Guard Rear Adm. Mary Landry said that BP would resume using undersea dispersants for the new attempt to trap the oil. Suttles said the lower marine riser package cap "should be able to capture most of the oil" that has fed what is now the largest oil spill in U.S. history, but he cautioned that the new cap will not provide a "tight mechanical seal." "We're confident the job will work, but obviously we cannot guarantee success at this time," he said. Engineers should be ready in about four to seven days to make the fresh attempt, he said. Landry said officials were "disappointed in today's announcement," but noted that the immediate efforts to stop the flow were never intended to be permanent. "The real solution, the end state, is a relief well," she said. BP currently is working on two relief wells, but they are not expected to be ready until August, Suttles said. Earlier, Suttles said that BP engineers would try to place a second blowout preventer -- the piece of equipment that failed when the Deepwater Horizon exploded on April 20 -- should the lower marine riser package fail. The failed blowout preventer is a 48-foot-tall, 450-ton apparatus that sits atop the well 5,000 feet underwater. Suttles and Landry praised the clean-up efforts, however, in light of the failure of the "top kill" attempt to stop the flow. "It's a tribute to everybody that we only have 107 miles of shoreline oiled and only 32 acres of marsh," Landry said. Meanwhile, teams in Louisiana were working Saturday on a clean-up project aimed at protecting coastal marshes. Plaquemines Parish President Billy Nungesser has said that machines would suck oil out of marshes Saturday after crews determined where to deploy them. But Nungesser told CNN that BP needed to "step up to the plate tonight to save our wetlands" by using its might to create sand barriers to prevent the oil from moving into the marshes. "BP needs to say it will pay to move those dredges and pump that sand berm," he said. "We are gonna die a slow death if we don't get that berm. We've got to have that barrier island." President Barack Obama, who toured the area Friday, said federal officials were prepared to authorize moving forward with "a portion of" an idea proposed by local officials, who want the Army Corps of Engineers to build a "sand boom" offshore to keep the water from getting into the fragile marshlands. But Nungesser said the marshes couldn't wait and that the effort needed to start immediately to save the Louisiana wetlands. Government scientists on Thursday said as many as 19,000 barrels (798,000 gallons) of oil were spewing into the ocean every day, making this disaster perhaps twice the size of the Exxon Valdez incident. Previously, BP officials and government scientists had said 5,000 barrels (210,000 gallons) of crude were flowing out daily. "This is clearly an environmental catastrophe," Hayward said Friday. "There's no two ways about it." In an e-mail message sent out after the announcement Saturday, Hayward said he was "disappointed that this operation didn't work." "The team executed the operation perfectly, and the technology worked without a single hitch," he said. "We remain committed to doing everything we can to make this situation right." Obama's visit to the region came under intense political pressure to take control of the situation. "We want to stop the leak, we want to contain and clean up the oil and we want to help the people in this region return to their lives and livelihoods as soon as possible," the president told reporters. About 25 percent of the Gulf of Mexico exclusive economic zone has been put off limits, according to the National Oceanic and Atmospheric Administration, and fishermen are worried the gushing oil will take a more serious toll than Hurricane Katrina did in 2005. "Katrina was nothing but rain, water and wind. This is poison. It's gas," oysterman Arthur Etienne said. CNN's Anderson Cooper contributed to this report.
answer:
NEW: BP will try lower marine riser package cap next .
NEW: Lower marine riser package cap will capture most, but not all of oil flow .
NEW: Officials: Only sure option is relief wells, still 2 months away .
NEW: Parish president wants BP to build sand barrier islands now .
Workers toil on beaches and in marshes to clean up .


question:
(CNN) -- Four years ago, Brandon Stanton became New York City's unofficial photo-chronicler. With his blog, Humans of New York -- which has over eight million followers on social media -- he has captured the heart and soul of the city's multi-national inhabitants. His trademark -- the micro narratives that accompany each image -- has been imitated in the far reaches of the globe, from Sydney to Khartoum. Last month, he turned his lens, and poignant interview style, to the world at large. In partnership with the United Nations, he is touring roughly a dozen countries in a bid to raise awareness for the peacekeeping organization's Millennium Development Goals. His first stop: Iraq and Jordan. 'My eyes were opened' Though his trip was "months in the works," Stanton didn't anticipate that his arrival in Erbil, Iraq would coincide with that of ISIS. The first people he questioned were Yazidi refugees who had only freshly fled their homes, their families, their lives as a whole. "My idea of what constitutes personal tragedy has been expanded a lot just listening to what these people are going through," admits Stanton. For the Yazidis he approached -- from the student who had to abandon his long sought after Master's degree to flee bombs to the mother whose children can't stop crying for home -- Stanton found himself falter at the prospect of pursuing his traditional line of questioning. "When you've just abandoned your house, and your family is surrounded by a hostile army, and you don't know if they're going to survive, it's just inappropriate to ask what your happiest memory with your mother is," he says. "I felt I couldn't ask them beyond their present circumstances, because their lives were absolutely consumed by those circumstances." 'Pack a bag and get ready to run' The day Stanton landed in Iraq, ISIS captured the Mosul Dam. The day he left, the United States started air strikes. His time there, he admits, was often terrifying. "When I was in Dohuk, there was a moment I got a call in the middle of the night from UNICEF telling to pack a bag and get ready to run, because ISIS was shelling the town and had broken through the lines," he recalls. "It was an abundance of caution it turned out, but it was a sleepless night." It was one of many moments, he admits, when he appreciated what it means to feel secure. "I went to this place where all people wanted was a bit of security: to send their kids to school, to start a business, to get married and live a normal life. And I realized that in the absence of physical security, no other layers of life can really be experienced," he says. "That constant uncertainty seeps into your psyche in a way that you can't really pinpoint until you go back to a place that is secure." For Stanton, that place was Jordan. "I really noticed when I landed in Jordan, where the infrastructures was in place and there was no imminent threat, that there was a load lifted from my psyche," he says. The stories he heard were different as well. The tenor, though often still heart-breaking (he visited Zaatari Refugee Camp that houses around 80,000 Syrians), demonstrated a lighter side of the human character. In the absence of immediate danger, there was hope. "The other thing this trip has made me realize is the depth of ambition, particularly in underdeveloped countries," he says. "Everybody I talked to had such big dreams, and often such limited opportunities with which to achieve those dreams."
answer:

Brandon Stanton launched Humans of New York blog .
Partnering with U.N., he's on a world tour that started in Iraq and Jordan .
His mini narratives reveal the struggles and dreams of ordinary people .