Assembling the Delta II Rocket (IMAGE) NASA/Goddard Space Flight Center Caption On Pad 17-B, the mobile service tower (left) approaches the Delta II rocket (right). The solid rocket boosters in the tower will be mated with the rocket. Credit NASA/Jim Grossmann Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.