Okay, I've seen many videos about the white elephant plane(s) and heard many reports about them. And while I was thinking that, I came across this:
Wouldn't it be a fairly likely possibility that the white elephants were used as the guides? What I mean is... look at the picture below.

(Above image public domain, you can use it for what you want, there is a large version in the Wikimedia Commons)
Two Sea-Air-Land (SEAL) team members, one equipped with an AN-PAQ-1 laser target designator. Keep this image in mind.
Now, I remember something about the white elephant being uniformly identified as a C-130.
Now, take a look at the picture below.

This is a AC-130H Spectre, a military gunship. It is a modified, third-generation C-130 specifically equipped for this task.
"These heavily armed aircraft incorporate side-firing weapons integrated with sophisticated sensor, navigation and fire control systems to provide surgical firepower or area saturation during extended periods, at night and in adverse weather."
http://www.fas.org/man/dod-101/sys/ac/ac-130.htmThis plane is usually armed with:
two M61 20mm Vulcan cannons
with 3,000 rounds
one L60 40mm Bofors cannon
with 256 rounds
one M102 105mm howitzer
with 100 rounds One 25mm GAU-12 Gatling gun
(1,800 rounds per minute)
one L60 40mm Bofors cannon
(100 shots per minute)
one M102 105mm cannon
(6-10 rounds per minute)
Now, let's say you modify this plane and replace three of the guns with laser designators. Have it fly around New York, and have three lasers trained on three different buildings (WTC1, WTC2, Pentagon). Then, when the planes fly in, have them home in on the laser point and they will go straight in to the side of the buildings. Today's laser-guided bombs can be sent straight through a specific window with a laser point. Laser guided weaponry is EXTREMELY accurate. This could explain how certain videos show the plane hitting one of the towers dive-bombed in at a steep angle, pulled up at the last second, and twitched to the left to hit a point on the building.
Now, what do you think? I see no other reason for a C-130 to be in the sky that day circling New York. What are your opinions? Do you think this is a credible explanation?