Breaking the pedestal:
The action of hacking through the particle board upsets the three devices arranged atop it. The radio and laptop have a low enough centre of balance that they just slide around a little. The TV, however, slides more then you expected and tips over, falling off the ground hitting the floor with a crash. The noise damn near scares the life out of you before you see what it was.

(Before anyone asks, there are vaccuum tubes inside the TV, most of them still intact despite their fall. The screen however is shattered, allowing you to reach right in for them if you want them.)

Prying apart the cracked pedestal and being more careful of the radio & laptop, you see that there is some equipment underneath. An AV cord from the TV leads to a DVD player beneath the pedestal. The radio and laptop only have power cords, which (along with the TV and DVD power cords) run into a small groove on the floor, covered by carpet to mask it, and eventually into a wall section.

If you look in the very back of the broken TV you will find that someone modified it to accept input from the DVD signal rather than from its antenna.

If you restore power to the room, you'll see that the laptop and radio can be powered on. The laptop is locked, and the hacks you used to access staff network profiles on the office computers don't really apply here. It seems as if the ctrl, alt, and/or delete buttons have been completely disabled as well.

The eject button for the CD-rom tray on the laptop has also been disabled. Apparently the exhibit design guys know how to visitor-proof a laptop display.

Through the double doors:
Looking out through the double-doors at the south end of the staff-only corridor, you can see the main 3F hall and the top of the stairs. Directly across from you are the south elevators and another set of staff-only double-doors.

Major edit:
I forgot to mention - there's an airplane. Yep, a whole friggin' airplane, and I totally forgot to say anything. It's a WWI biplane, and it hangs from the ceiling of the great hall (directly over the octagonal cutaway that can be seen on 2F on the map, but much much higher up). The airplane is suspended by thin metal cables from the roof, tilted at an angle to show off more of the machine, and some 80 feet higher than the 3f floor underneath it.

Exploring Exhibit 3:
The exhibit is much as you remember it from when you walked through 8 months ago. The exit (the door you came in through) is sort of a "what they accomplished" finale; the area near the staff doors has more about the experiences of veterans trying to adjust to life after coming home from WWII., and what the "boom time" was like for everyone. Moving counter-clockwise you go through the extensive WWII section, which includes approximately equal attention for the actual war and the civilians back at "the home front."

Beyond the WWII section is a bunch of stuff about the Great Depression, which has some of the most striking photographs and firsthand tales in the entire exhibit. Past that is the other set of doors that lead back out of the exhibit.

Throughout the place are computer kiosks. Each one has a four different screens set into a hand-built casing so that no CPU or keyboard is visible. The screens are touch-screens, and allow visitors to play video of interviews with/stories from various octogenarians who lived through the time period in question.

Of some possible interest are two artefacts in the WWII area: one, a stnadard issue American assault rifle from the war which, along with its bayonet and several (probably inert) hand grenades, is behind glass; the other, an entire armoured half-track. Enjoy!

No one jumps out at you as you explore the exhibit area.