union-tribune" reporter wendy frye. she's with me now. wendy, the video, the scene there, i want to have you describe it in just a second. but do you know yet who green li lit the tear gas? does anyone know? >> brooke, hi, thanks for having me. i do believe that the border patrol, customs border protection, cbp has put out a statement that says that the border patrol threw the tear gas. i definitely saw it coming from the other side of where we were, which was on the mexican side, so i know that it came from the u.s. border patrol that were standing there on the other side of where we were. >> and take me into the thick of it. here you are, some of your video, what was it like? who were you with? set the scene. >> sure. sure. it was really chaotic, as you can see. so a group of the migrants ran around the federal police and they did rush up to the border, up to a border fence, and then a small group, a handful, maybe, of young men, young adults, maybe young teenagers started -- they found kind of a little hole