The late Gerard Holmgren pioneered the “no-planes” conclusion. Holmgren was diagnosed in 2010 with a very aggressive cancer when he was the same age as I am now, 51; two weeks later he was dead. Holmgren’s work was cutting-edge, he was spot-on about the no-planes and was probably correct about missiles, but his observations about the “truth movement” were prescient.
Below is some essential reading for any student of 9/11.
Original source, 911Closeup.com: