The Customs and Border Protection (CBP) agency has recently stopped performing “transportation center” checks along the northern border. Previously, the CBP often stopped and questioned individuals riding trains and buses that were within 100 miles of the border. Almost always, the trains and buses that were stopped were not crossing the border. Instead they were stopped because they were within 100 miles of the border. These stops were argued to be necessary because immigrants entering without authorization would try to get away from the border by bus or train. However, statistics show that only about 1% of those detained had actually crossed the border in the prior 72 hours.