EIKENBERRY RETIREMENT U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, dons a U.S. Army ball cap at the end of the retirement ceremony for U.S. Army Lt. Gen. Karl Eikenberry at the Hall of Heroes, Pentagon, April 28, 2009. Eikenberry is retiring after 35 years of service and will be sworn in as the U.S. ambassador to Afghanistan in a ceremony by Secretary of State Hillary Clinton. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 877454-T-CJK62-305.jpg Photo Gallery