U.S. invites Russia to measure missile-defense test WASHINGTON (Reuters) - The United States has invited Russia to use its own radars and other sensors to size up one or more U.S. missile-defense flight tests as part of a new push to persuade Moscow that the system poses it no threat, a Pentagon official said on Tuesday. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/PNp48j9E25I/us-russia-usa-missiles-idUSTRE79H80D20111018