(CBS News) LONDON - There were clashes Thursday between anti-U.S. protesters and Yemeni police at the U.S. Embassy in Sanaa. CBS News sources say a large group of protesters reached the walled compound, but failed to breach any of the buildings inside the compound as police fired warning shots to try to disperse the crowd. All U.S. embassies and diplomatic posts were ordered to increase security measures Wednesday by President Obama, following the deadly attack on the U.S. consulate in Benghazi, Libya, on Tuesday.
