The Pentagon on Wednesday said it has begun deploying 1,500 active duty troops to help secure the southern border in the coming days, putting in motion plans US President Donald Trump laid out in executive orders shortly after he took office to crack down on immigration. Acting Defence Secretary Robert Salesses said the Pentagon will provide military aircraft to support Department of Homeland Security deportation flights for more than 5,000 detained migrants and the troops will assist in the construction of barriers. The number of troops and their mission may soon change, Salesses said in a statement. "This is just the beginning," he said. It remains to be seen if they will end up doing law enforcement, which would put American troops in a dramatically different role for the first time in decades. The active duty forces will join the roughly 2,500 US National Guard and Reserve forces already there. There are currently no active duty troops working along the roughly 3,219-km ...