Tehran's forces have carried out frequent missile and drone attacks in the Middle East since the breakdown of the US-Iran ceasefire, raising renewed concerns about Washington's supply of the weapons needed to intercept them. - 'Extensive use of interceptors' -But Trump's war against Iran has resulted in major reductions in US weapons supplies. "The air defense campaign has been largely successful with high -- though not perfect -- interception rates," but "this has required extensive use of interceptors," CSIS said. The United States is pushing hard for defense companies to increase the pace at which weapons including interceptors are produced. But the United States still faces dangers from interceptor shortfalls, CSIS said in its analysis.