some people here need to use some critical thinking skills. if you look at the object you will see that it's size in relation to the ground makes its size an aircraft. Or one of the biggest most super secret cruise missiles to ever be developed.
plus we have the personal accounts of people who saw the aircraft.
"On a Metro train to National Airport, Allen Cleveland looked out the window to see a jet heading down toward the Pentagon. 'I thought, "There's no landing strip on that side of the subway tracks,"' he said. Before he could process that thought, he saw 'a huge mushroom cloud. The lady next to me was in absolute hysterics.'"
- "Our Plane Is Being Hijacked." Washington Post, 12 Sep 2001
"I was supposed to have been going to the Pentagon Tuesday morning at about 11:00am (EDT) and was getting ready, and thank goodness I wasn't going to be going until later. It was so shocking, I was listening to the news on what had happened in New York, and just happened to look out the window because I heard a low flying plane and then I saw it hit the Pentagon. It happened so fast... it was in the air one moment and in the building the next..."
- "U.S. Under Attack: Your Eyewitness Accounts." BBC News, 14 Sep 2001
"As I approached the Pentagon, which was still not quite in view, listening on the radio to the first reports about the World Trade Center disaster in New York, a jetliner, apparently at full throttle and not more than a couple of hundred yards above the ground, screamed overhead. ... Seconds before the Pentagon came into view a huge black cloud of smoke rose above the road ahead. I came around the bend and there was the Pentagon billowing smoke, flames and debris, blackened on one side and with a gaping hole where the airplane had hit it."
- "Eyewitness at the Pentagon." Human Events, 17 Sep 2001
"Frank Probst, an information management specialist for the Pentagon Renovation Program, left his office trailer near the Pentagon's south parking lot at 9:36 a.m. Sept. 11. Walking north beside Route 27, he suddenly saw a commercial airliner crest the hilltop Navy Annex. American Airlines Flight 77 reached him so fast and flew so low that Probst dropped to the ground, fearing he'd lose his head to its right engine."
- "A Defiant Recovery." The Retired Officer Magazine, January 2002
"USAToday.com Editor Joel Sucherman saw it all: an American Airlines jetliner fly left to right across his field of vision as he commuted to work Tuesday morning. It was highly unusual. The large plane was 20 feet off the ground and a mere 50 to 75 yards from his windshield. Two seconds later and before he could see if the landing gear was down or any of the horror-struck faces inside, the plane slammed into the west wall of the Pentagon 100 yards away. 'My first thought was he's not going to make it across the river to [Reagan] National Airport. But whoever was flying the plane made no attempt to change direction,' Sucherman said. 'It was coming in at a high rate of speed, but not at a steep angle—almost like a heat-seeking missile was locked onto its target and staying dead on course.'"
- "Journalist Witnesses Pentagon Crash." eWeek.com, 13 Sep 2001
"'I mean it was like a cruise missile with wings, went right there and slammed into the Pentagon,' eyewitness Mike Walter said of the plane that hit the military complex. 'Huge explosion, great ball of fire, smoke started billowing out, and then it was just chaos on the highway as people either tried to move around the traffic and go down either forward or backwards,' he said."
- "Witnesses and Leaders on Terrorist Attacks." CNN, 11 Sep 2001
"'(The plane) was flying fast and low and the Pentagon was the obvious target,' said Fred Gaskins, who was driving to his job as a national editor at USA Today near the Pentagon when the plane passed about 150 feet overhead. 'It was flying very smoothly and calmly, without any hint that anything was wrong.'"
- "Bush Vows Retaliation for 'Evil Acts'." USA Today, 11 Sep 2001
"Aydan Kizildrgli, an English language student who is a native of Turkey, saw the jetliner bank slightly then strike a western wall of the huge five-sided building that is the headquarters of the nation's military. 'There was a big boom,' he said. 'Everybody was in shock. I turned around to the car behind me and yelled "Did you see that?" Nobody could believe it.'"
- "Bush Vows Retaliation for 'Evil Acts'." USA Today, 11 Sep 2001
"'I saw the tail of a large airliner. ... It plowed right into the Pentagon," said an Associated Press Radio reporter who witnessed the crash. 'There is billowing black smoke.'"
- "America's Morning of Terror." ChannelOne.com, 2001
"Omar Campo, a Salvadorean, was cutting the grass on the other side of the road when the plane flew over his head. 'It was a passenger plane. I think an American Airways plane,' Mr Campo said. 'I was cutting the grass and it came in screaming over my head. I felt the impact. The whole ground shook and the whole area was full of fire. I could never imagine I would see anything like that here.'"
- "Pentagon Eyewitness Accounts." The Guardian, 12 Sep 2001
There are many more I could add............................