After placing a wreath at the Tomb of the Unknowns, President George W. Bush bows his head in a moment of silence during Memorial Day service at Arlington National Cemetery May 26. The president delivered the keynote address at the cemetery's Memorial Amphitheater after the wreath-laying ceremony. Photo by Sgt. 1st Class Doug Sample, USA After placing a wreath at the Tomb of the Unknowns, President George W. Bush bows his head in a moment of silence during Memorial Day service at Arlington National Cemetery May 26. The president delivered the keynote address at the cemetery's Memorial Amphitheater after the wreath-laying ceremony. Photo by Sgt. 1st Class Doug Sample, USA SHARE: Download: Full Size (0.3 MB) Credit: VIRIN: 320209-Y-HUL37-422.jpg Photo Gallery