A powerful explosion rocked a building just 150 feet from a military situation room frequently used by Russian President Vladimir Putin in Rostov-on-Don Thursday. The blast, which the Kremlin said was from shooting down an airstrike, tore apart facades, smashed windows in three buildings and damaged several parked cars next to the headquarters of the Russian Southern Military District, according to the Independent, citing the state-owned RIA news agency. One person was injured, according to regional Governor Vasily Golubev. Video footage of the early morning attack showed a massive fireball rising into the sky in a developed area of the...