ABU DHABI BRIEFING U.S. Defense Secretary Chuck Hagel briefs the press in Abu Dhabi in the United Arab Emirates, April 25, 2013. Hagel announced that the U.S. intelligence community assesses with varying degrees of confidence that the Syrian regime has used chemical weapons -- specifically the nerve-agent sarin -- on a small scale. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 867577-T-WXW09-005.jpg Photo Gallery