The Moscow concert hall attack was not the first during Putin’s 25-year rule
The scale and cruelty of the attack placed it among the most violent and shocking of attacks on Russian soil.
The attack on a Moscow concert hall in which armed men opened fire and set the building ablaze, killing at least 133 people, was the latest in a series of bombings and sieges that have unsettled and outraged Russians during Vladimir Putin’s nearly quarter-century as either prime minister or president.