He will hold a meeting with Russia’s security chiefs, government officials and the heads of Moscow and the Moscow region later Monday.The Kremlin also on Monday expressed confidence in the country’s powerful security agencies, as questions swirl over how they failed to thwart the massacre despite public and private warnings by the United States’ intelligence apparatus.”Special services are working tirelessly, dealing with all the threats, all the challenges facing our country and society,” Peskov said.Putin, a former Soviet spy, headed the FSB briefly before becoming president and takes…