US Missile Shield already Defeated?

Anonymous Coward writes "Forbes is reporting that although interest in the missile defense system has waned while the US military addresses more pressing matters of immediate concern, the Russians have already developed an anti-missile-defense missile designed to defeat the system. Were the US military to actually prove that the missile defense shield worked, the Russian rocket's "zig-zag" flightpath taken en route to it's target would render the shield useless. Russian President Vladimir Putin says that the non-ballistic trajectory would leave the projectile virtually impossible to down or divert. The author feels inclined to say that the missile defense shield was intended as a defense against rogue states such as North Korea that have not acquired this technology yet."