Indian lawmakers have approved legislation that would make it more difficult for terrorists to gain access to weapons of mass destruction. India's lower house of parliament Thursday passed a bill that would make it a crime for any Indian citizen to sell nuclear, chemical and biological weapons and missile technology. The Weapons of Mass Destruction and their Delivery Systems bill also sets a penalty of five years to life in prison for violating the law. India and neighboring Pakistan have had nuclear weapons since 1998. Neither of the rival nations has signed the 1970 Nuclear Nonproliferation Treaty. To become law, the bill must be approved by the Indian parliament's upper house and then be signed by President Abdul Kalam.