21/01/1960 Little Joe 4 suborbital Mercury test reaches 16 km
Little Joe 1B
The rocket was used for testing of launch escape system (LES) and heat shield for project Merury. The LES is a device connected to a space capsule, used to quickly separate the capsule from its launch vehicle rocket in case of emergency. A successor, Little Joe II, was used for flight testing of the Apollo LES.