US Air Force (USAF) mascots, (left to right) SENIOR AIRMAN (SRA) Lee "The General" Heineken, STAFF Sergeant (SSGT) Gabriel "Snark" Nelson, Technical Sergeant (TSGT) David "Teddy" Larrison and MASTER Sergeant (MSGT) Jeffrey "Road Kill" Carr, mug for the camera during the opening ceremonies of Guardian Challenge at Vandenberg Air Force Base (AFB), California (CA). Guardian Challenge, the world's premier space and missile competition, is a four-day event hosted annually at Vandenberg AFB, CA