FBI Deputy Director Dan Bongino has announced a major arrest in a case involving rock attacks against federal immigration authorities that left one agent wounded.Bongino and other federal officials said a Compton man accused of throwing concrete blocks at federal officers in Paramount in June was taken into custody Wednesday morning at the U.S.-Mexico border.Elpidio Reyna, 39, of Compton, was arrested at the San Ysidro Port of Entry by FBI agents, with assistance from U.S. Customs & Border Prote