Antares Upgrade Will Use RD-181s In Direct Buy From Energomash, Aviation Week “Congressional concern about Russian aggression in the Crimean peninsula led to a ban in the new National Defense Authorization Act (NDAA) on using RD-180s purchased after Russia occupied the Ukrainian territory on Feb. 1. Grabe said that legislation will not affect the deal to buy RD-181s from Energomash. “We’ve coordinated with all relevant congressional committee staffs to keep […]