Problem: The hijackers attacked at 9:28. While traveling 35,000 feet above eastern Ohio, United 93 suddenly dropped 700 feet. Eleven seconds into the descent, the FAA's air traffic control center in Cleveland received the first of two radio transmissions from the aircraft. During the first broadcast, the captain or first officer could be heard declaring "Mayday" amid the sounds of a physical struggle in the cockpit. The second radio transmission, 35 seconds later, indicated that the fight was continuing. The captain or first officer could be heard shouting:" Hey get out of here-get out of here-get out of here." On the morning of 9/11, there were only 37 passengers on United 93-33 in addition to the 4 hijackers. This was below the norm for Tuesday mornings during the summer of 2001. But there is no evidence that the hijackers manipulated passenger levels or purchased additional seats to facilitate their operation. The terrorists who hijacked three other commercial flights on 9/11 operated in five-man teams. They initiated their cockpit takeover within 30 minutes of takeoff. On Flight 93, however, the takeover took place 46 minutes after takeoff and there were only four hijackers. The operative likely intended to round out the team for this flight, Mohamed al Kahtani, had been refused entry by a suspicious immigration inspector at Florida's Orlando International Airport in August. Because several passengers on United 93 described three hijackers on the plane, not four, some have wondered whether one of the hijackers had been able to use the cockpit jump seat from the outset of the flight. FAA rules allow use of this seat by documented and approved individuals, usually air carrier or FAA personnel. We have found no evidence indicating that one of the hijackers, or anyone else, sat there on this flight. All the hijackers had assigned seats in first class, and they seem to have used them. We believe it is more likely that Jarrah, the crucial pilot-trained member of their team, remained seated and inconspicuous until after the cockpit was seized; and once inside, he would not have been visible to the passengers.

Question: "Which two factors were different between the three other hijacked planes and United 93?"

Answer: "The number of hijackers"
Answer: yes

Problem: These experiments in political Islam faltered during the 1990s: the Iranian revolution lost momentum, prestige, and public support, and Pakistan's rulers found that most of its population had little enthusiasm for fundamentalist Islam. Islamist revival movements gained followers across the Muslim world, but failed to secure political power except in Iran and Sudan. In Algeria, where in 1991 Islamists seemed almost certain to win power through the ballot box, the military preempted their victory, triggering a brutal civil war that continues today. Opponents of today's rulers have few, if any, ways to participate in the existing political system. They are thus a ready audience for calls to Muslims to purify their society, reject unwelcome modernization, and adhere strictly to the Sharia. Social and Economic Malaise In the 1970s and early 1980s, an unprecedented flood of wealth led the then largely unmodernized oil states to attempt to shortcut decades of development. They funded huge infrastructure projects, vastly expanded education, and created subsidized social welfare programs. These programs established a widespread feeling of entitlement without a corresponding sense of social obligations. By the late 1980s, diminishing oil revenues, the economic drain from many unprofitable development projects, and population growth made these entitlement programs unsustainable. The resulting cutbacks created enormous resentment among recipients who had come to see government largesse as their right. This resentment was further stoked by public understanding of how much oil income had gone straight into the pockets of the rulers, their friends, and their helpers. Unlike the oil states (or Afghanistan, where real economic development has barely begun), the other Arab nations and Pakistan once had seemed headed toward balanced modernization. The established commercial, financial, and industrial sectors in these states, supported by an entrepreneurial spirit and widespread understanding of free enterprise, augured well. But unprofitable heavy industry, state monopolies, and opaque bureaucracies slowly stifled growth. More importantly, these state-centered regimes placed their highest priority on preserving the elite's grip on national wealth. Unwilling to foster dynamic economies that could create jobs attractive to educated young men, the countries became economically stagnant and reliant on the safety valve of worker emigration either to the Arab oil states or to the West. Furthermore, the repression and isolation of women in many Muslim countries have not only seriously limited individual opportunity but also crippled overall economic productivity. By the 1990s, high birthrates and declining rates of infant mortality had produced a common problem throughout the Muslim world: a large, steadily increasing population of young men without any reasonable expectation of suitable or steady employment-a sure prescription for social turbulence.

Question: "Which state barely had economic development unlike other states in its time?"

Answer: "The oil states"
Answer: no

Problem: Plants also detect the daily cycle of light and darkness. Do you know how plants respond to these changes? Some plants open their leaves during the day. It is during these hours the plant can collect sunlight. At night, the plant closes its leaves to prevent water loss. Many plants respond to the change in the length of the day. As days grow shorter, some plants respond by going dormant. Dormant is when a plant suspends its growth. It does this in order to survive. Shorter days signal the coming of winter. Winter in most areas means extreme cold. It is also very dry in the winter months. As winter approaches, some plants respond by their leaves changing color. After the change in color, they fall off. This dormancy period helps trees. It allows them to survive the cold and dry winter. Plants only want to grow when conditions are right.

Question: "What two things happen to a plants' leaves as winter approaches?"

Answer: "The leaves change color and then fall off the plant"
Answer:
yes