this video announced the Xeus and also showed NASA's Space Exploration Vehicle rover with its two astronauts as a possible payload for the XEUS. On 30 April 2014, the NASA announced that Masten Space Systems was one of the three companies selected for the Lunar CATALYST initiative. NASA signed an unfunded Space Act Agreement (SAA) with Masten in September 2014. The SAA lasts until August 2017, has 22 milestones and calls for "End-to-end demonstration of hardware and software that enables a commercial lander on the Moon." In December 2015, United Launch Alliance (ULA) were planning to upgrade the XEUS's main body from a Centaur Upper Stage to the Advanced Cryogenic Evolved Stage (ACES) which they were developing, significantly increasing the payload. Masten Space intended to incorporate experience from developing the XL family of cargo landers into the XEUS family of landers. In August 2016, ULA's president and CEO said ULA intended to human rate both the Vulcan and ACES. XEUS was cancelled in July 2018. XL-1 The XL-1 was a small cargo lunar lander that Masten was developing as part of the Lunar CATALYST program (SAAM ID 18250). When powered by MXP-351 the XL-1 was designed to land payloads onto the surface of the Moon. As of August 2017, Masten Space expected the XL-1 to have four main engines which were being prototyped on the XL-1T and a wet mass of about . On 11 October 2016, Masten Space Tweeted a video showing the test firing of its new bi-propellant combination, internally called MXP-351. The test used an existing engine with an experimental injector, the first 'Machete', producing thrust. Development of their 3D printed regen lunar engine that would use MXP-351 to land on the Moon continued. , a thrust version of Machete for the terrestrial testbed of the lander, dubbed XL-1T, was being manufactured. In October 2017, NASA extended the Lunar CATALYST agreement for 2 years. On 29 November 2018, it was announced that Masten was eligible to bid at a Commercial Lunar Payload Services (CLPS) contract by NASA. Should the proposal be accepted by NASA to be built, the landing to Moon would be no earlier than 2021. On 8 April 2020, NASA selected Masten to deliver eight payloads – with nine science and technology instruments – to the South Pole of the Moon in 2022 with the XL-1 lander. Masten would also operate the payloads, helping to