Guatemalan security refused to allow us on the plane with fly reels loaded with fly line. After trying unsuccessfully to negotiate with them and not wanting to check nearly $4,000 worth of fly reels, things took a turn for the worse. We were told in broken English that because we were being disruptive in the security area, we weren't going to be permitted to leave the country. After a little more haggling, we were told by the head of security for La Aurora International Airport that we would be permitted to leave on our flight, but that my reels were being left in Guatemala - with him. Finally, the station chief for American Airlines intervened. She was able to get us on the plane, and I reluctantly surrendered my Pelican case and its contents to the hold of the airplane.