The younger brother of the suicide bomber who killed 22 people at an Ariana Grande concert in Manchester is just as guilty as the attacker, a British prosecutor said Tuesday, as the surviving sibling went on trial for murder. Hashem Abedi, 22, is accused of conspiring with his brother Salman Abedi, who died when he detonated a knapsack bomb in the foyer of Manchester Arena on May 22, 2017. The attack killed 22 people and injured more than 260 others.