Roughly a week after Donald Trump started his second term as president, the US military issued an order to three freight airlines operating out of Dover air force base in Delaware and a US base in Qatar: stop 11 flights loaded with artillery shells and other weaponry that were bound for Ukraine.

In a matter of hours, frantic questions reached Washington from Ukrainians in Kyiv and from officials in Poland, where the shipments were coordinated. Who had ordered the US Transportation Command, known as TransCom, to halt the flights? Was it a permanent pause on all aid? Or just some?