A senior U.S. general revealed on Thursday that border authorities had asked the Pentagon for help amid in surge in arrivals from Mexico that could even get worse if Washington lifts pandemic restrictions. Air Force Gen. Glen D. VanHerck, head of North American Aerospace Defense Command, appeared before senators to answer questions about threats to the U.S. Details of the new request emerged as preliminary U.S. Customs and Border Protection data suggest authorities are in line to make more than 200,000 detentions along the Mexican border in March.