From a CBP Spokesperson: On average, since the beginning of FY19, roughly 2,200 people a day along our southwest border are apprehended or deemed inadmissible by CBP agents and officers. With the varying terrains, the threats of smugglers and traffickers, along with continued large caravans and groups of migrants seeking illegal entrance into our country, our agents encounter various challenging obstacles throughout the day. Recent mobilization of large caravans of Central Americans traveling through Mexico to reach our southwest border, has added increased and new challenges to an already complicated and dangerous mission. Criminal events, such as the breach of the border wall in San Diego, involving assaults on law enforcement and a risk to public safety, are routinely monitored and investigated by authorities. These activities could result in a more thorough review of those seeking entrance into our country. It is protocol following these incidents to collect evidence that might be needed for future legal actions and to determine if the event was orchestrated. CBP and our law enforcement partners evaluate these incidents, follow all leads garnered from information collected, conduct interviews and investigations, in preparation for, and often to prevent future incidents that could cause further harm to the public, our agents, and our economy.