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Picture one shows two vehicles on Route 27 that were damaged by light pole debris, clipped by the aircraft as it passed overhead and across Route 27, then plowed into the Pentagon. The pole to the left is one of several that were clipped by the aircraft. The pole is also not complete, you can see it was sheered at the top.
The second shot was taken before the first and from the area of the Navy Annex. You can see the Pentagon on fire from the initial strike and the building is still standing. The small white car is the same from picture one. Some of the fires in this picture are vehicles that were parked by the helo pad that are on fire.
The third picture is when the first fire truck (from National Airport) arrived and started its initial suppression efforts. To the right you can see the diesel generator trailer on fire and the darker smoke as the diesel fuel tank exploded and is fueling fires in that area. Above the trailer you can see a white area of fire suppression foam on the building right where the 4th corridor exit is. You also notice that the building is severely damaged at that point as you can see the shift in the granite facing. This is one of the hinge areas many see in later photos. Note that the grass and grounds of the area are not gouged or disturbed. Recall that in the Khobar Towers bombing, where a 20,000lb truck bomb too the face off of the dormitory and killed 19 US Airmen, it truck bomb left a crater over 85 feet wide and some 25 feet deep. There is no such crater present. Also note at the bottom of the picture, the concrete "jersey" barrier behind the red car. Looking to the front of the jersey you see the grey top of the guard rail that surrounds the Pentagon on Route 27, it too has not been breached, meaning no truck rammed through it to drive up to the building to detonate anything.
Picture 4 is a closer view of the hinge area of corridor 4 mentioned above. You can clearly see the fire suppression foam's loosing battle against the aviation fuel. You also see the support columns still holding the building together. For those of you wondering why the windows above are intact after such a blast, it's because they are special blast proof windows to defeat a bombing. They were specially installed during the renovation of that wedge by strapping them into the original concrete. You see these windows again. You are primarily focused on the second floor of the building in this shot, the first floor ir obstructed by the stream of foam.
Picture 5 shows a view from the intact Route 27 guardrail. The fire truck has run out of suppression foam and water. You see some of the secondary fires are out (like the vehicles to the truck's left, but the fires rage inside the building still. You can see the hinge area to the right and the sagging support columns along the base of the building (REMEMBER: The building is five stories, but on the outside E-Ring, the 5th floor does not have windows). You can also see the pressure on the building by looking at the difference in roof heights from the left side to the right, that's the amount of weight being born after columns had been shattered by the impact, and as they continued to fail from 1600+ degree fires. You can see the difference in the size of the hinge area to the right from previous photos also. Just above the man's head and to the right you can see the impact hole that continues from the fire burning on the second floor and extending to the left through the smoke and haze.
Picture 6 is a different angle of the same shot. Note no truck marks on the grass area, nor any crater that would have been caused by a truck bomb. For those asking why the fire truck didn't make any marks, know that they use much wider and lower pressure tires so they spread the weight over an area and gently flatten it so they can move into any type area. This contrasts with a rigid and thin truck tire that would tear grass upon turning, or make depressions due to lack of asphalt support. You can see wire bundles and other items from the wedge renovations. The diesel trailer is to the right of the rightmost firefighter. The top left of the photo shows how much buckling is taking place from the right side hinge area to the left joint where the building is about to fall. The fire above the wire bundles is the opening the aircraft made upon impact.
Picture 7 shows the E-ring building supports finally failed and the building collapsed. The backmost fires you see raging are the roof of the E-Ring that collapsed and folded back upon itself. Fires still rage in the rest of the structure as well as inside the roofing. Look very closely at the left wall sheer point (in the area where it is still standing), you can clearly see where the second floor rear area of the E-Ring is gone. That's the angle the plane took and the resulting damage. The area right under the still standing wall to the left also clearly shows support columns missing, that's because that's where the initial impact basically blew then away. Look at the green blast windows in the collapsed area. They are those special windows that survived, and those happen to be from the 3rd floor. Notice even in facility failure, the windows are holding the face of the building and it's cross columns together. Picture 7 is basically similar to number 6.
Picture 8 is similar but again showing the intact guardrail and undisturbed grass. You can see the diesel trailer is still on fire. Witnesses believed it was clipped and damaged by the right wing of the aircraft.
Picture 9 was taken on attack +1 and after the fires on the E-ring had been extinguished, but you can still see the smoke from the fires in the roofing behind the shot. You can see the amount of water that still is present, as well as the heavy equipment that is starting to roll in and bring shoring supplies so the threatened corner can be propped up. You can also clearly see equipment in areas where if there was a crater from a truck bomb, they just couldn't be. You also see the tire marks they are making in the grass area. The saturation of the grassy area by all the leaking and poured water started to soften the area to the point where vehicles could have become stuck and hampered the rescue efforts. There was a forecast of rain for attack +2 that necessitated the building of sand and gravel roads so all aspects of the rescue and recovery operations could proceed.
Picture 10 shows another angle of the same shot. You can see the sheered area where which is the left most entry hole the aircraft made, and the corresponding levels of debris from the blast effect. Again, no blast crater that would have been created by any type of truck bomb is present.
Picture 11 is from the helo pad that is to the left of the other shots. You can see the plane's entry hole to the far right of the picture. You can also see that the fire truck was severely burned on the side towards the blast, but intact otherwise. The two firefighters who were stationed in the truck had just finished waxing the truck when they heard, then saw, the plane. They ran to the left of this picture and were shielded from death by their very own fire truck, which performed its last mission at that point by absorbing the blast. This picture also starts to show the level of small debris fragments that were the plane. I speculate these parts were probably the remains of its left side wing assemblies. There are similar amounts of small parts and debris present throughout the entirety of the grass/helo pad area.
Picture 12 is a closer shot of the level of debris by the 5th corridor side of the building.
Picture 13 shows more of the debris field, including a twisted piece of the American Airliner.
Picture 14 shows damage to the cab on Route 27 when a piece of a clipped light pole struck his windshield.
Picture 15 shows a lone soldier reflecting on the attack.