Dick Cheney, who served four Republican presidents and whose role as an architect of the post-9/11 war on terror made him one of the most powerful—and controversial—U.S. vice presidents in history, died. He was 84. He died due to complications of pneumonia and cardiac and vascular disease, his family said in a statement.

Former US Vice-President Dick Cheney, a key architect of George W Bush's "war on terror" and an early advocate of the invasion of Iraq in 2003, has died at the age of 84.

During the younger Bush's administration, he singlehandedly turned his role as vice-president from what was traditionally an empty role, with little formal power, into a de-facto deputy presidency, ov...