Russian police officers stand guard as Muslims pray outside the main Moscow mosque during celebrations of Eid al-Adha, a feast celebrated by Muslims worldwide, which Muslims in Russia call Kurban-Bairam in Moscow, Russia, Tuesday, Oct. 15, 2013. According to the press service of Moscows main police department, about four thousand police officers, Interior troops and others will be ensuring security during the Eid al-Adha celebration events.