Extra 1,000 troops to be sent to US-Mexico border, says senior defence official

The Pentagon will increase the number of active-duty troops along the US-Mexico border to about 6,000 by the start of next month, a senior US defence official has said.The troops currently stationed at the border have also been ordered to string more concertina wire and install detection systems in remote areas away from official ports of entry, the senior defence official said.The official, who was authorised by the Pentagon to speak to reporters only on the condition of anonymity, said that so