Pakistanis from across the nation are flocking to the morgues of Karachi to identify loved ones who perished in Thursday’s devastating suicide attack on a welcome-home rally for former two-time Prime Minister Benazir Bhutto. The blasts killed 133 and left hundreds critically injured. As families struggled to identify mangled bodies shattered by the force of the explosions, grief turned to rage. But the inevitable questions surrounding Pakistan’s worst ever terrorist attack — who did this, and why? — remain unanswered. Aryn Baker (’01) reports from Kabul for TIME.

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