The Department of Defense (DOD) is sending 1,140 additional U.S. troops to the southern border of the United States to help bolster the efforts of U.S. Customs and Border Protection (CBP) to control the influx of illegal immigrants."The DOD continues to work with the Department of Homeland Security to fill critical capabilities gaps at the southern border in accordance with President Trump’s Executive Order, ‘Protecting the American People Against Invasion,'" U.S. Northern Command (USNORTHCOM) said.There are currently 4,300 U.S. active-duty troops at the southern border, and an additional 1,140 troops will bring the total to 5,440 active-duty service members.USNORTHCOM said