A small number of U.S. military forces inside Ukraine have recently begun doing onsite inspections to ensure that Ukrainian troops are properly accounting for the Western-provided weapons they receive, a senior U.S. defense official told Pentagon reporters Monday. The official, who spoke on condition of anonymity to provide a military update, would not say where the inspections are taking place or how close to the battlefronts the U.S. troops are getting. The official said U.S. personnel can’t do inspections “close to the front lines,” but said they are going where security conditions allow.