The US has sent at least two Patriot missile systems to Ukraine, which has repeatedly asked for the prized air defense batteries.SAM YEH/AFP via Getty ImagesAdm. Sam Paparo is concerned that the US is giving out vital defenses it needs to deal with China."It's now eating into stocks," he said on Tuesday of advanced weapon shipments to Ukraine and Israel.Paparo urged the Pentagon to start replenishing those stocks and expand beyond its original inventory.The US Navy's top commander in the Indo-Pacific raised concerns on Tuesday that the Pentagon's advanced weapons shipments to Ukraine and Israel could sap the strength it needs to deal with China.While speaking at the Brookings Institution, Adm.