Thermal conditions at the World Trade Center site as seen from the north. The footprint of 1 World Trade Center (North Tower) is below and to the right of center, and the footprint of 2 World Trade Center (South Tower) is slightly above center. The gap immediately to the right of the footprint of 2 World Trade Center was formerly occupied by 3 World Trade Center (Marriott Hotel). The L-shaped building toward bottom left is 5 World Trade Center, and 4 World Trade Center is immediately above it. 6 World Trade Center is immediately below the footprint of 1 World Trade Center. The domes at right are part of the adjacent World Financial Center complex. The small white dots are emergency vehicles.

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