During Combined Endeavor 2004, (left to right) Italian Contractor Guseppi Carucci, US Air Force (USAF) STAFF Sergeant (SSGT) Jason Bryant, Italian Warrant Officer 3 (WO3) Sandro Venazangeli and Bulgarian Captain (CPT) Stanislav Stoychev work on encrypted certificates and signature blocks for secure e-mail at Combined Endeavor, Camp Sarafovo, Bulgaria (BGR)