Patriot system failed might have failed to intercept Scud fired at Riyadh’s airport Selasa, 05 Desember 2017 Defence, News, WAR, World A group of experts have concluded that the American Patriot air defense missile system failed to intercept a Burqan-2, a variant of the Scud missile, fired at Saudi Arabia’s King Khalid international airport in Riyadh on Nov. 4. Tweet Subscribe to receive free email updates: