The Biden administration has quietly given Ukraine permission to strike inside Russia — solely near the area of Kharkiv — using U.S.-provided weapons, three U.S. officials and two other people familiar with the move said Thursday, a major reversal that will help Ukraine to better defend its second-largest city. “The president recently directed his team to ensure that Ukraine is able to use U.S. weapons for counter-fire purposes in Kharkiv so Ukraine can hit back at Russian forces hitting...