U.S. lays barbed wire at border as migrant caravan draws closer

Some 400 migrants who broke away from the main caravan in Mexico City arrived in the border city of Tijuana on Tuesday by bus, according to a Reuters witness.U.S. Defense Secretary Jim Mattis said he would travel to the border area on Wednesday, his first visit since the military announced that over 7,000 U.S. troops would go to the area as the caravan of mostly Hondurans has made its way through Mexico.The U.S. Customs and Border Protection (CBP) said in a statement that it would close lanes at