US President Donald Trump invoked the Defence Production Act in an effort to bolster delivery of weapons whose stockpiles critics say have been strained by the war in Iran and other conflicts. The president cited “systemic constraints in the munitions industrial base” in his order for Defence Secretary Pete Hegseth to make “voluntary agreements and plans of action” to address the depleted US defence capacity, according to a memo dated June 11 and posted in the Federal Register. It was not...