How_the_bullets_are_made_in_USA_factories_%253F_weaponry_military_power_American__%25E7%25BE%258E%25E5%259C%258B%25E5%25AD%2590%25E5%25BD%2588%25E5%25B7%25A5%25E5%25BB%25A0%25E8%25A3%25BD%25E4%25BD%259C%25E6%25B5%2581%25E7%25A8%258B