For more than 60 years, missiles have been a symbol of international power. Influential nations have them, and others want them. As early as the 1950s, ballistic missiles served as a principal component of European security, with U.S.-made Thor and Jupiter intermediate-range ballistic missiles deployed in NATO countries such as Britain, Italy, and West Germany. On the other side of the Iron Curtain, Soviet-made Scud, SS-21, SS-23, and FROG rockets were deployed to nearby Warsaw Pact countries.