article_snippet.sent: Then the terror began.
article_snippet.sent: the terror started with an explosion and gunshots around 5:30 a.m.
article_snippet.sent: It wasn't until about 15 hours after the attack began that the explosions and gunfire around Garissa finally ended.
article_snippet.sent: Interior Ministry Secretary Joseph Nkaissery announced that four terrorists were killed and the operation had ended "successfully.