already in the air and on the ground... I'd imagine a chunk was already sent to Poland and Germany to be moved quickly to the front lines...

"Maj. Gen. Pat Ryder, Pentagon press secretary, would not confirm the package or details, but said the U.S. has a robust logistical system in place, built over the past two years of weapons’ deliveries to Ukraine, and is “doing everything we can to be poised to respond quickly” once the bill is signed. He said the U.S. has storehouses of military equipment in Europe and — as it's done in the past — can tap those to get aid into Ukraine within days."