UNKNOWN SOLDIER CEREMONY U.S. Defense Secretary Chuck Hagel participates in a wreath-laying ceremony at the Unknown Soldier Memorial in Cairo, April 24, 2013. Egypt is Hagel's fourth stop on a six-day trip to the Middle East to meet with defense counterparts. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 906182-S-ARC74-009.jpg Photo Gallery