On 14 August 1959, the first attempt to fly a Lot B missile with a live stage and dummy warhead ended in disaster. The missile was released 3.9 seconds earlier than intended before it had built up sufficient thrust. One of the umbilicals was prematurely jerked free as the missile lifted, another umbilical sent an automatic cutoff command, and the Titan fell back onto the pad and exploded, causing extensive damage to LC-19. The pad was not used again for six months.