
This image taken from video obtained from Ugarit News, which has been authenticated based on its contents and other AP reporting, shows a rocket fired by Syrian rebels at Mannagh air base in the Aleppo province of Syria on May 13, 2013. (Associated Press/Ugarit News via AP video)

This image taken from video obtained from Ugarit News, which has been authenticated based on its contents and other AP reporting, shows a rocket fired by Syrian rebels at Mannagh air base in the Aleppo province of Syria on May 13, 2013. (Associated Press/Ugarit News via AP video)

** FILE ** This image made on Jan. 12, 2012, from an undated video posted on the Internet by a YouTube user self-identified as "semperfiLoneVoice" shows men in U.S. Marine combat gear, standing in a semicircle over three bodies. U.S. Defense Secretary Leon E. Panetta branded as "utterly despicable" the video purporting to show four U.S. Marines urinating on the corpses of Taliban fighters. (Associated Press)

Astronaut Chris Hadfield recording the first music video from space Sunday May 12, 2013. The song was his cover version of David Bowie's Space Oddity. (AP Photo/NASA, Chris Hadfield)

Defense Distributed, a Texas-based group, earlier this month test-fired the first gun — which it calls the Liberator — made with the 3-D printing technology. (defdist.org)

Defense Distributed, a Texas-based group, earlier this month test-fired the first gun — which it calls the Liberator — made with the 3-D printing technology. (defdist.org)

Radio host and columnist Armstrong Williams explores traditional values in his book "Reawakening Virtues: Restoring What Makes America Great." (Image courtesy of New Chapter Publisher)

President Obama speaks during his visit to Manor New Technology High School in Manor, Texas, on May 9, 2013. (Associated Press)

President Obama speaks during his visit to Manor New Technology High School in Manor, Texas, on May 9, 2013. (Associated Press)