Remembering Heroes

The bottom of this Space Shuttle Geocoin commerates the flights of the Challenger and Columbia space shuttles that did not return home. Their crews were heroes to us all.  This geocoin proxy wants to travel to locations that commerate Heroes from all walks of life.  Please add pictures if possible.

The bottom of this Space Shuttle Geocoin commerates the flights of the Challenger and Columbia space shuttles that did not return home.  Their crews were heros to us all. 

STS-51-L was the twenty-fifth flight of the American Space Shuttle program, which marked the first time an ordinary civilian, schoolteacher Christa McAuliffe, had flown aboard the Space Shuttle. The mission used Space Shuttle Challenger, which lifted off from the Launch Complex 39-B on 28 January 1986 from Kennedy Space Center in Florida. The mission ended in disaster with the destruction of Challenger 73 seconds after lift-off and the death of all seven crewmembers. The Rogers Commission determined the cause was due to the failure of an O-ring seal on one of the Solid Rocket Boosters (SRBs).

STS-107 was a space shuttle mission by NASA using the Space Shuttle Columbia, launched 16 January 2003. This was a multi-disciplinary microgravity and Earth science research mission with a multitude of international scientific investigations conducted continuously during 16 days in orbit. The seven-member crew died on 1 February 2003 when the shuttle disintegrated during reentry into the Earth's atmosphere. The cause of the accident was determined to be a piece of foam that broke off during launch and damaged the thermal protection system components (reinforced carbon-carbon panels and thermal protection tiles) on the leading edge of the left wing of the Shuttle orbiter, causing an extensive heat build-up. During re-entry the damaged wing slowly overheated and came apart, eventually leading to loss of control and total disintegration of the vehicle.