The San Francisco–Oakland Bay Bridge is a pair of bridges spanning San Francisco Bay of California. It carries approximately 280,000 vehicles per day on its two decks, and has one of the longest spans in the world. An engineering marvel at the time, the Bay Bridge took 3 years (1933-1936) and $77-million to complete.  It stretches 8 1/4 miles through a series of dual-level approaches, suspension bridges, a cantilever span and a tunnel.  Its east span collapsed in an earthquake in 1989.  The Bay Bridge celebrates the reopening of the east span in 2013.

The Boeing B-17 Flying Fortress is a four-engine heavy bomber aircraft developed in the 1930s for the United States Army Air Corps (USAAC). From its pre-war inception, the USAAC (later USAAF) touted the aircraft as a strategic weapon; it was a potent, high-flying, long-range bomber that was able to defend itself, and to return home despite extensive battle damage. It quickly took on mythic proportions, widely circulated stories and photos of B-17s surviving battle damage increased its iconic status.

The Space Shuttle Orbiter was the orbital spacecraft of the Space Shuttle program operated by NASA.  The orbiter was the first  reusable winged “space-plane” – a mixture of rockets, spacecraft, and aircraft. This space-plane could carry crews and payloads into low Earth orbit, perform on-orbit operations, then re-enter the atmosphere and land as a glider, returning its crew and any on-board payload to the Earth.  The orbiters were built by the Pittsburgh, PA based Rockwell International company beginning in the 1970’s.