April 1 (UPI) -- The U.S. Customs and Border Protection agency said Tuesday its field operations in southern California have been "working relentlessly" to prevent entry of replica firearm into the United States. Officials say that, since the start of this year, more than 1,000 replica firearms have been seized at Los Angeles International Airport (LAX) by CBP officers in coordination with the Consumer Product Safety Commission (CPSC). Advertisement "Replica firearms -- even though not always