The Pentagon’s inspector general says the agency has failed to track some $1 billion in military equipment provided to Ukraine for its fight against Russia’s invasion. The weapons in question include Javelins, Stinger missiles, night-vision devices and one-way attack drones. This comes as the White House said Thursday U.S. support to Ukraine “has now ground to a halt” amid stalled negotiations over a new funding package that congressional Republicans are demanding be conditioned on further militarizing the U.S.-Mexico border.