US closes busy border entry in Tijuana after migrant caravan arrives

US authorities have installed a new barrier at one of the busiest crossing points along the US-Mexico border following protests sparked by the contentious migrant caravan.The US authorities shut down one of two pedestrian bridges on the San Ysidro crossing, with the apparent hope that the barrier would slow any rush from those in the migrant caravan hoping to make their way north.The point of entry was closed for several hours, adding headaches in the area where 110,000 people cross every day in