TANKER PROPOSAL Deputy Secretary of Defense William J. Lynn III, center, Air Force Secretary Michael Donley, left, and Ashton Carter, undersecretary of Defense for acquisition, technology and logistics, right, hold a press conference at the Pentagon, Feb. 24, 2010, to announce that the U.S. Air Force has issued a formal Request For Proposal for the KC-X next-generation aerial tanker. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 549406-E-DRR83-709.jpg Photo Gallery