Group 1 - NASA is seeking rocket components from Boeing and Lockheed Martin's joint venture, United Launch Alliance (ULA) [1] - The Exploration Upper Stage of NASA's Space Launch System, built by Boeing, has faced delays and costs have exceeded $2.8 billion [2] - NASA plans to potentially use ULA's Vulcan rocket's Centaur V for lunar missions, which shares the same propellant as the SLS, although this plan is not finalized [2] Group 2 - NASA has delayed the launch of the Artemis II vehicle due to issues with the rocket, specifically an "interrupted flow of helium" observed by engineers [3]