Donald Rumsfeld, the acerbic architect of the Iraq war and a master Washington power player who served as US secretary of defense for two presidents, has died at the age of 88. The pugnacious businessman, bureaucrat and former lawmaker helped drag victims out of the burning Pentagon on September 11, 2001. The al Qaeda attacks heralded the War on Terror and years of foreign entanglements that he directed and that ultimately ended his political career when they went sour.