United States Air Force Thunderbirds

The USAF Thunderbirds is the air demonstration squadron of the United States Air Force (USAF), based at Nellis Air Force Base, Nevada.

The squadron performs aerobatic formation and solo flying with in various airshows and events using F-16 Fighting Falcons. The name of "Thunderbirds" was from a legendary creature in the mythology of several indigenous North American cultures, as one of their maneuvers on November 11, 2012 shown on the postcard. You can purchase the matching customized stamps from Zazzle.

Update on November 9, 2014 with a Youtube video from the 2014 Aviation Nation.

Mount Olympus

On this Earth Day came postcard GR-38421 showing Mount Olympus, the highest mountain in Greece with 52 peaks, deep gorges, and exceptional biodiversity. According to Wikepedia, its highest peak Mytikas, meaning "nose", rises to 2,917 meters or 9,570 feet and is one of the highest peaks in Europe in terms of topographic prominence. Olympus was notable in Ancient Greek Mythology as the home of the Twelve Olympians. Mount Olympus is also noted for its very rich flora with several special species. It has been the first National Park of Greece since 1938, and a World's Biosphere Reserve.