WTC 1 & WTC 2 on fire
After WTC 1 and WTC 2 was hit by the hijacked Flight 11 and Flight 175, the fires developed uncontrollably until the supporting steel beams, weakened by the high temperature, no longer could support the construction.
Sequence
After WTC 1 and WTC 2 was hit by the hijacked Flight 11 and Flight 175, the fires developed uncontrollably until the supporting steel beams, weakened by the high temperature, no longer could support the construction.