The greatest strategic threat to the United States is an attack by one or more ballistic missiles armed with nuclear or other weapons of mass destruction. Today, the United States remains completely vulnerable to this form of attack.
Missilethreat.com is dedicated to explaining this threat, and the urgent need for robust and layered missile defenses. Systems based on land, sea, air, and in space which are capable of intercepting a missile during any phase of its flight are necessary to provide for the common defense.
The S-400 missile launcher was on display for Russia's May 9 celebration and military parade in honor of its victory over Nazi Germany in World War II. The S-400 is Russia's relatively new missile defense system, which has been deployed around the capital city of Moscow since 2007. The S-400 is similar to the American Patriot system. 