Analysis of information sources in references of the Wikipedia article "United Airlines Flight 93" in English language version.
A male passenger, Edward Felt, did call from the lavatory of the plane, but never mentioned an explosion or puff of smoke, said John Shaw, the dispatcher who took the call. 'Didn't happen,' he said. Felt's widow, Sandra, who heard the tape of the call, corroborated Shaw's story.
... we positively identified seismic signals associated with United Airlines Flight 93 that crashed near Shanksville, Somerset County, Pennsylvania. The time of the plane crash was 10:06:05±5 (EDT).
a temporary memorial was created on a hilltop overlooking the crash site.
13. When will the Memorial be finished?
... one of the study's principal authors now concedes that 'seismic data is not definitive for the impact of UA 93.', it states that the author of the seismographic study published a second study on July 5, 2004 retracting his earlier report, and confirmed it in an email to the Commission two days later.
a temporary memorial was created on a hilltop overlooking the crash site.
13. When will the Memorial be finished?
... we positively identified seismic signals associated with United Airlines Flight 93 that crashed near Shanksville, Somerset County, Pennsylvania. The time of the plane crash was 10:06:05±5 (EDT).
... one of the study's principal authors now concedes that 'seismic data is not definitive for the impact of UA 93.', it states that the author of the seismographic study published a second study on July 5, 2004 retracting his earlier report, and confirmed it in an email to the Commission two days later.