8:46 AM: 1 World Trade Center was hit by a 767 jetliner.
9:03 AM: 2 World Trade Center was hit by a 767 jetliner.
∆ = 17 = Q
8:46 AM: 1 World Trade Center was hit by a 767 jetliner.
9:03 AM: 2 World Trade Center was hit by a 767 jetliner.
∆ = 17 = Q