OK, so I don't know if this is considered a main stream source or not. I tend to stay with CNN and then think for myself. I got a link to it on Fox on Facebook. It does appear to have happened. And maybe it has been posted, but I haven't seen it.
http://rt.com/usa/168940-mexican-mil...copter-shoots/A Mexican law enforcement helicopter crossed into the United States early Thursday and fired on two US Border Patrol agents.
Andy Adame, a spokesperson for US Border Patrol, said in a statement issued soon afterward that the incident had indeed occurred and that the two government agents targeted were not injured.
The incident occurred early Thursday around 100 yards north of the US/Mexico border, Adame said, around eight miles southwest of the Village of San Miguel on the Tohono O'odham Indian Nation.