California Air National Guard STAFF Sergeant Richardson, a member of the 144th Security Forces Squadron, stands watch at a entry control point while the flightline is quarantined during an Operational Readiness Exercise at Fresno Air National Guard Base, Fresno Yosemite International Airport, Calif., on Nov. 3, 2004. He is armed with a 5.56 mm M16A2 rifle. (USAF PHOTO by SENIOR MASTER SGT. Chris Drudge) (Released)