now, they are heading north in hopes of starting a new life in the united states. but for most, that dream is being squelched. some are being chased down by u.s. border agents on horseback. they are horrified by these images. and if they make it to this huge encampment, they likely won t get much farther. cnn s rosa flores reports from the border for us tonight. what was it like under the bridge? horrible, she said. new video from under the del rio international bridge showing the overcrowded conditions and thousands living in squalor. these images were taken by a cuban couple who say they waited there for four days before being processed by u.s. immigration authorities, and released at a nearby gas station.ing it was hs mother s dream for him to get to america. the american dreams of thousands of migrants still under the