At least 40 people are dead in Moscow and another 100 injured after a shooting and at least one explosion at Crocus City Music Hall in Moscow. The concert hall, located in Krasnogorsk in the Moscow Region, is one of the capital’s largest music venues, having hosted the likes of Eric Clapton and Elton John over the years. Videos posted online show gunmen, dressed in combat fatigues, unleashing a barrage of gunfire within the concert hall. An explosion was then heard, setting the building on fire. The videos show panicked civilians fleeing for safety as the attackers, armed with automatic weapon…