An MSNBC reporter got to see first-hand the struggles Border Patrol agents face every day in dealing with illegal immigrants crossing the U.S.-Mexico border—even why President Trump’s border wall is necessary. 

As the reporter was discussing the wall prototypes that are being constructed near San Diego, California, a group of crossers hopped the existing fence. 

“What happened?” the reporter asked as a group of agents on horseback approached the border crossers. “The people are crossing!”

“Almost on cue, a group of asylum-seekers, migrants not from Mexico, jumped over the existing fence to turn themselves in to border agents on horseback,” the reporter narrated.