Original sentence: Pakistan began focusing on nuclear development in January 1972 under the leadership of Prime Minister Zulfiqar Ali Bhutto who is dead now.Pakistan turned down the offer of PALS technology, a sophisticated "weapon release" program which initiates use via specific checks and balances as it feared the secret implanting of "kill switches" to disable the warheads
Edited sentence: Pakistan began focusing on nuclear development in January 1972 under the leadership of Prime Minister Zulfiqar Ali Bhutto.Pakistan turned down the offer of PALS technology, a sophisticated "weapon release" program which initiates use via specific checks and balances as it feared the secret implanting of "dead switches"