The United States is once again at war in the Middle East, and most Americans say it isn't worth the cost. Al Jazeera's Josh Rushing asks why the US keeps fighting: oil, a $2.4 trillion defence industry, lobbyists or a political system that rarely holds anyone to account? Retired General Mark Kimmitt and journalist Spencer Ackerman debate why, and whether voters can end the forever wars. Contributors: Mark Kimmitt – Retired US Army brigadier general and former assistant secretary of state for political-military affairs Spencer Ackerman – Journalist, author and writer of the Forever Wars newsletter