Anti-Ballistic Missile Weapons?

Rolan asks: "With the recent development of Anti-balistic Missile Technology, and it's obvious ability to be expanded to an Anti-Satelite/Spacecraft Weapon, I've begun to wonder what exactly happend to the treaties we made reguarding these weapons. Specificially I know that, during the cold war, we made treaties with the USSR that prohibit both parties from developing such weapons. Has the disolving of the USSR Nullified/Voided these treaties, or have we simply decided to froget them? Or is there actually a loop hole that alows these weapons? "