COSTA MESA (CBSLA.com) — A popular Orange County gun show may shatter attendance records this weekend. KNX 1070′s Pete Demetriou reports The Crossroads of the West gun show is expected to draw massive crowds as lawmakers in Washington consider a proposed federal ban on assault weapons. The event drew an estimated 18,000 attendees during its stop in Ontario earlier this month, marking the first local event since a shooting rampage that claimed the lives of 20 children and six adults in Newtown, Connecticut. But organizers are expecting attendance at the two-day event at the Orange County Fairgrounds in Costa Mesa...