NASA and the Defense Advanced Research Projects Agency (DARPA) will partner on developing a new nuclear thermal rocket engine to be used for space travel. The Demonstration Rocket for Agile Cislunar Operations (DRACO) program, is a non-reimbursable agreement that outlines roles, responsibilities, and processes aimed at speeding up the development

Source: Hot Hardware – NASA And DARPA Plan Nuclear Thermal Rocket Test To Finally Put Humans On Mars