A U.S. Air Force combat rescue officer, left, with the 131st Rescue Squadron performs a buddy check on a pararescueman with the unit before boarding a Brazilian Air Force C-130E Hercules aircraft at Natal Air Base, Natal, Brazil, Nov. 7, 2013, during CRUZEX 2013. CRUZEX is a Brazilian-led air-to-air, aerial refueling and command-and-control training exercise focused on building interoperability between several partner nation air forces.