With the Black Hawk pitched at a forty-five-degree angle astride the wall, the crew sent a distress call to the idling Chinooks.

NEWYORKER: Getting Bin Laden

Along one side of the new lobby, an entire wall (slanted at an 83-degree angle) serves as the surface for a seamless panorama of projected video, 50 feet long and as much as 8 feet high.

ENGADGET: Museum of The Moving Image plans multi-million dollar updates with HD, 3D

For instance, the kiosk explains that Rothermel's deliberate perspective puts the viewer 125 yards from the copse of trees just below Cemetery Ridge in an area of the battle line known as "the Angle, " a jog in the stone wall defended by the Philadelphia Brigade.

WSJ: Capturing Gettysburg | Objects of Valor | State Museum of Pennsylvania | By Mark Yost