NASA launched its IBEX satellite from the Stargazer mother ship launch pad above the Marshall Islands.
The primary purpose of the Interstellar Boundary Explorer (IBEX) was to use energetic neutral atoms to take photos of the boundary between our solar system and interstellar space. It was launched using a Pegasus XL launch vehicle, a special type of rocket launched from the air, as opposed to a launchpad on the ground, hence why the Stargazer mother ship was required.