Islamabad, Apr 27 (EFE).- Bilawal Bhutto Zardari, the son of slain ex-prime minister Benazir Bhutto and grandson of former president Zulfikar Bhutto, executed after a military coup, Wednesday took oath as the new Pakistan foreign minister, becoming the youngest top diplomat of the oftenâturbulent nation. Hina Rabbani Khar was the previous youngest foreign minister when …