US President Donald Trump expressed confidence in the US military campaign against Iran even as the duration of military operations remains uncertain. But former Secretary of State Antony Blinken says real change in Iran will require a sustained military focus in the Middle East that could wear down US weapons stockpiles. Mark MacCarley, retired Major General in the US Army and Managing Attorney, MacCarley and Rosen spoke to Bloomberg’s Horizons Middle East & Africa anchor Joumanna Bercetche on the likely duration and cost of such wars. (Source: Bloomberg)