Pakistan, Aug. 7 -- Ghana's Defence Minister Edward Omane Boamah died in a military helicopter crash on Wednesday along with four other officials and three airforce crew, the government said. Julius Debrah, President John Mahama's chief of staff, told a press conference that the crash in which Boamah, Environment, Science and Technology Minister Ibrahim Murtala Muhammed and others were killed was a national tragedy. President Mahama's office calls incident a national tragedy; Environment and Science and Technology Minister and others were killed was a national tragedy. "The president and government extend our condolences and sympathies to the families of our comrades and the servicemen who died in service to the country," Debrah said. Aut...