Soyuz T-10-1 was the first of two Soyuz T-10 missions. Just 90 seconds before liftoff, the Soyuz-U rocket caught fire. The control teams sent commands for Soyuz T-10 to abort off the top of the rocket and carry the two-person crew safely away. But the manual command never reached the rocket as communication lines had already burned through at the pad. The Soyuz T-10-1 crew could not manually activate the abort system. An emergency radio command was sent after several seconds as two people in the control room had to receive the same order and enter the same command into the computer within five seconds to send the command. Soyuz T-10-1's Launch Escape Tower fired to pull the crew away from the rocket, which exploded six seconds later. The crew experienced 17 Gs of acceleration during the abort but landed safely 4 km from the burning launch pad.