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Everything we know about the Brussels terror attacks in under 3 minutes

02:54

Matt Lauer looks at the scope of the Brussels terror attacks that occurred when two explosions rocked the check-in area of Brussels Airport on Tuesday, while another explosion shook a metro station in the Belgian capital, killing 31 and wounding scores of others. ISIS has claimed responsibility for the attack, which is suspected to be carried out by at least two people, brothers Khalid and Ibrahim el-Bakraoui. A manhunt is on for a third suspect, Najim Laachraoui.