Before executing static-line jumps, Tech. Sgt. Jason Martinez gives instructions regarding the static-line jumps at Fairchild Air Force Base, Wash., Nov. 6, 2012. Static line and free-fall jumps are mandatory training courses to become a SERE specialist. Martinez is a survival, evasion, resistance and escape specialist with the 336th Training Group. (U.S. Air Force photo/Airman 1st Class Ryan Zeski)