Orbital Sciences successfully launched their Antares on its first COTS resupply mission today (after 2 demo flights last year). While reading up on it, I was surprised by the amount of foreign and pre-existing parts of the vehicle. - The first stage is made by the Yuzhnoye Design Bureau in Ukraine and is derived from the Zenit rocket but has refurbished motors from the Russian N1 moon rocket. - The second stage is an Alliant Techsystems (ATK) Castor 30 which is derived from Castor motors used on previous OS rockets and before that, missiles. - The presurised cargo module is built by Thales Alenia Space of Italy. - The service module is derived from OS's Star geostationary satellite buses. It's quite a contrast from SpaceX's mostly in-house approach.