People holding a banner reading "I am Brussels" behind flowers and candles to mourn for the victims at Place de la Bourse in the center of Brussels, Tuesday, March 22, 2016. Bombs exploded at the Brussels airport and one of the city's metro stations Tuesday, killing and wounding scores of people, as a European capital was again locked down amid heightened security threats. (AP Photo/Martin Meissner)

Islamic State claims it set off deadly bombings in Brussels

Belgium raised its terror alert to the highest level, diverting planes and trains and ordering people to stay where they were for most of th…