Rollback from GRAIL s Rocket . ... Credit Copyright: Ben Cooper ( Launch Photography ) Explanation: This dramatic time-lapse photo traces a 20 minute long, late evening rollback of the lighted Mobile Service Tower at Cape Canaveral Air Force Station Launch Complex 17. ... The duo will journey to the Moon on NASA's Gravity Recovery and Interior Laboratory mission, GRAIL, using precision formation flying to map the Moon's gravity field . ... NASA Web Site Statements, Warnings, and Disclaimers . ...