Titan II LR91 Stage 2 Engine

Stage 2 burned for about 3 minutes and propelled the missile to an altitude of about 200 miles (320 km). It was shut down at the appropriate time by the on-board guidance system. When stage 2 separated from the missile, the re-entry vehicle (RV), which carried the nuclear weapon, continued on toward the target in a pre-planned ballistic trajectory. The RV was the only part of the missile to actually reach the target.