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Coelacanth eggs are large, with only a thin layer of membrane to protect them. Embryos hatch within the female and eventually are born alive, which is a rarity in fish. This was only discovered when the American Museum of Natural History dissected its first coelacanth specimen in 1975 and found it pregnant with five embryos. [67]
10:10: Several upper floors of the Pentagon's west flank collapse above the impact zone, 23 minutes after Flight 77 hit the building, due to the extensive damage by the crash and the ensuing fire. 10:28:25: The North Tower of the World Trade Center collapses, 1 hour and 42 minutes after the impact of Flight 11.
Planning of the September 11 attacks. On the morning of September 11, 2001, 19 al-Qaeda terrorists hijacked four commercial passenger jet airliners, intentionally crashing two into the World Trade Center in New York City. The hijackers crashed a third airliner into the Pentagon. The fourth plane crashed in a field near Shanksville, Pennsylvania.
Spectators look up as the World Trade Center goes up in flames September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack.
A total of 2,996 were killed on 9/11 and more than 6,000 were injured, according to The Washington Post. The total dead include the hijackers; the plane passengers, pilots and crew; 2,606 people ...
One World Trade Center (WTC 1), the "North Tower", was, at 1,368 ft (417 m), six feet taller than Two World Trade Center (WTC 2), the "South Tower", which was 1,362 ft (415 m) tall. Numerous closely spaced perimeter columns provided much of the structural strength, along with gravity load shared with the steel box columns of the core. [23]
On the morning of Tuesday, September 11, 2001, Islamist terrorist group al-Qaeda hijacked four commercial airliners in the United States and tried to crash them into large buildings, succeeding in three cases. American Airlines Flight 11, having departed from Boston, was flown into the North Tower of the World Trade Center at 08:46.
The original World Trade Center (WTC) was a complex of seven buildings in the Financial District of Lower Manhattan in New York City. Built primarily between 1966 and 1975, it was dedicated on April 4, 1973, and was destroyed during the September 11 attacks in 2001. At the time of their completion, the 110-story-tall Twin Towers, including the ...