Raytheon and Leonardo announced on 25 January that they will no longer jointly pursue the US Air Force’s (USAF’s) T-X competition. Raytheon stated that the companies were unable to reach a business agreement that is in the best interest of the US Air Force. The company, in partnership with Leonardo, was offering the T-100 for the T-X competition, which was based on Leonardo’s Aermacchi M-346 advanced trainer. The company’s withdrawal left Leonardo without a US partner as a prime contractor. Leonardo was originally teamed with General Dynamics (GD) on the T-100, but GD dropped out in March 2015. The Air Force plans to buy 350 T-X aircraft and expects to downselect to a single vendor this year.