also urging businesses to mandate proof of vaccination not just for their employees and customers but for their vendors as well. shannon. >> shannon: laura, thank you so much. breaking tonight: new number showing the number of unaccompanied children encountered by border authorities while they were trying to cross the border illegally likely hit an all-time high in july. also, footage from the southern border were a large group of migrants, at least 1,000 strong has been waiting under a bridge in mission, texas, near a popular grassy area. it was a busy monday at mcallen, texas, where hundreds of migrants were given tickets to travel elsewhere into the u.s. sunday night in la jolla, fox news witnessed a group of more than 200 migrants giving themselves up to border agents. many of the young children were coughing. covid-19 case has reportedly surged to 900% among migrants in the rio grande valley in july. fox news has also learned of a