Jeff Bezos offered NASA up to $2 billion in waived costs in exchange for a lunar lander contract for Blue Origin, the aerospace company Bezos founded and owns, in an open letter addressed to NASA administrator Bill Nelson posted on Monday. 

The proposition is Bezos' latest attempt to secure a Human Landing System (HLS) contract, an award that funds a commercial crewed lunar lander in support of NASA's Artemis program, which aims to land astronauts on the Moon by 2024. Blue Origin's rival, SpaceX, won the HLS contract in April, and Bezos has been fighting NASA's decision ever since.