Tear gas

In this Nov. 25, 2018 file photo, a migrant runs from tear gas launched by U.S. agents, amid members of the press covering the Mexico-U.S. border, after a group of migrants got past Mexican police at the Chaparral crossing in Tijuana, Mexico. A San Diego TV station says the U.S. government ran an operation to screen journalists, activists and others while investigating last year’s migrant caravan from Mexico. KNSD-TV says documents leaked by a Homeland Security source show a January database listing at least 10 journalists, seven of them U.S. citizens, as warranting secondary screening at U.S. points of entry. (AP Photo/Rodrigo Abd, File)