The images show several different shots of the SR-71 Blackbird (Jetfire) as mentioned in the call sheets, Bumblebee, and unknown green car, and a black Porsche (I think). From the comments, they have identified it as a Chevy Beat, which is a not yet released concept car pretty much proving its an Autobots Transformers alt mode. A scene is being filmed near the Blackbird but I was not able to identify if Shia, Megan or John were part of that scene.
The last image
Update: From the commenters and pictures from the HowDesign (further below) that show it parked on the runway with none of the usual filming activity identify the plane as Michael Bay's personal plane. I didn't know he even had one. I thought that area was a no fly zone without special permission but then he is working with the US Armed Services so permission was probably easy to get. The call numbers of the plane were used for Blackout. I am partial to Autobots remaining in various automobile forms so more then happy to be wrong on there being an ariel Autobot.
Also, Topherlyon said if you look above the "I" on the Information Booth sign that is Shia's head and earlier saw Megan Fox walking from the cast trailers behind the Smithsonian.