The attack on europe’s third-busiest airport was even deadlier than the one in brussels in march, where both the airport and a metro train were hit. no one claimed responsibility for the carnage, butthe evidence pointed strongly to islamic state (is). if so, it demonstrated is’s growing operational sophistication. this was urban commando warfare, much like the attack on mumbai in 2008 by lashkar-e-taiba, a pakistani jihadist group