When all other sources of economic growth appear tapped out, there is always the military-industrial complex coming to the rescue of US GDP with the sale of arms and equipment to the world's biggest purchaser of weapons: Saudi Arabia. Because when one looks beyond the pageantry, pomp and circumstance of Trump's visit to Saudi Arabia, the main purpose behind the president's visit is precisely that: selling weapons, some $350 billion over the next decade, according to estimates.