** FILE ** El Paso police officers lookout into the Mexican border city of Ciudad Juarez after a heavy gun battle erupted in Ciudad Juarez, Mexico, Saturday, Aug. 21, 2010. (AP Photo/Raymundo Ruiz)

Photo by: Raymundo Ruiz

** FILE ** El Paso police officers lookout into the Mexican border city of Ciudad Juarez after a heavy gun battle erupted in Ciudad Juarez, Mexico, Saturday, Aug. 21, 2010. (AP Photo/Raymundo Ruiz)