Photos taken after the Pentagon crash do not support the Government conspiracy theory that Flight 77, a Boeing 757 airliner, demolished a major portion of the masonry structure:
Seismic waveform data also brings into question what struck the Pentagon. Seismologists have detected other 9/11 aircraft even pinpointing exact crash times for the Boeing 737 airliners that crashed into the WTC Towers and the aircraft alleged to be Flight 93 that crashed in Pennsylvania. The seismologists observed:
We analyzed seismic records from five stations in the northeastern United States, ranging from 63 to 350 km from the Pentagon. Despite detailed analysis of the data, we could not find a clear seismic signal. Even the closest station ( = 62.8 km) at Soldier's Delight, Baltimore County, Maryland (SDMD) did not record the impact. We concluded that the plane impact to the Pentagon generated relatively weak seismic signals.