 During the United States trip, Prime Minister Benazir Bhutto faced heated criticism and opposition on the nuclear weapons program, who however responded fiercely and in turn sharply criticized U.S.'s nonproliferation policy and demanded that the United States honor its contractual obligation.Although Benazir was able to convince the U.S. business community to invest in Pakistan, she was unable to revert the economic embargo which kept investment away from the country.In 1998, Prime minister Nawaz Sharif ordered to conduct first nuclear tests after Benazir Bhutto called for the tests (see "Chagai-I" and "Chagai-II"), in response to Indian nuclear tests (see "Pokhran-II").