Jane’s is reporting that Chile would like Israel to upgrade some of its F-16s due to controls and limitations set by the American Foreign Military Sales (FMS) system.
By Hippocamelus [CC BY-SA 3.0], from Wikimedia Commons
The partially-gated article says Chile was required to seek permission from the U.S. for its F-16s to fly air patrols armed with AIM-120s during a 2013 summit.