Crawler Transporter 2 Trek. NASA public domain image. Kennedy space center.

A technician communicates with the driver of NASA’s upgraded crawler-transporter 2 (CT-2) during the return drive to the Vehicle Assembly Building (VAB) at the agency’s Kennedy Space Center in Florida from its test drive to Launch Pad 39B. The crawler’s recently completed upgrades and modifications were tested to ensure the vehicle will be ready to support NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.