From 9/11 Encyclopedia:
Many websites had been influenced by photos, who implied that
Unidentified Flying Object on September 11 at the WTC was an
extraterrestrial object. Others claimed, it was a missile. A few
supported the possibilities, that the "missile" was in fact the
mircowave weapon system "thermobarics", shot out of the Building
7,which later collapsed under strange circumstances. While many
photos based on photo manipulations (japanese UFO - animation), many
websites continued to insist on a extraterrestrial or military
object. D.E. Alexander claimed, that there had been an UFO already
on July 24th 2000. http://www.realufos.com/wtc.shtml
Realufos was established in May 2002 in Coral Springs, Florida.
Alexander was a supporter of Sollog.com, who was outed as a fraud.
Sollog was created in 1998 in Coral Springs, Florida Sollog is in
reality disinfo and hoax specialist