Los Angeles is under siege as protesters set fire to driverless cars and authorities rain down a hail of rubber bullets on demonstrators as they march against President Donald Trump's crackdown on illegal migrants. Horrifying scenes showed Waymo cars erupting into flames and emitting toxic gases as rioters chained themselves to furniture and created blockades to grind Downtown Los Angeles to a complete halt on Sunday night as violence stretched into a third day. Trump sent in 2,000 National Guard troops and placed 500 Marines on standby, while the LAPD has authorized the 'use of less lethal munitions' to regain...