The figures represent a significant depletion of the pre-war stockpile, which CSIS estimated numbered around 2,200 Patriots (of the platform’s two most-modernized variants) and 452 THAAD missiles. There are no good alternatives to Patriot and THAAD for ballistic missile defense. President Donald Trump expressed his desire to replenish “the more sophisticated stuff” when asked about munitions stockpiles aboard Air Force One on Monday, but the president held that the inventories are “in very good shape.” CNN previously reported that Caine cited the dwindling munitions stockpile in a Friday meeting with Trump during which the commander-in-chief was weighing a major escalation in the war. Analysts say it could take years to fully replenish the US stockpile of high-end munitions, like Patriot missiles, due to the lead time for producing those weapons.