Trump administration official defends tear gas use at Mexico border

The firing of tear gas canisters by U.S. border agents toward migrants in Mexico near a border crossing last month followed regulations, a senior Trump administration official said in testimony to Congress on Tuesday.On Nov. 25, U.S. border agents fired tear gas to disperse a group of migrants near the U.S.-Mexico border crossing separating Tijuana from San Diego when some rushed through fencing into the United States.A day after the incident, Mexico's foreign ministry presented a diplomatic not