A Reuters report says:
U.S. government officials have briefed the Belgian government about the capabilities of the Lockheed Martin Corp (LMT.N) F-35 fighter jet, as Brussels prepares to replace its aging fleet of 60 F-16s, a source familiar with the matter told Reuters.Another looking at the networking capabilities/interoperability for future defense. If they buy, it will be in the 2020 timeframe (they plan on retiring their F-16s between 2015 and 2025).
The source, who was not authorized to speak publicly, said Belgium was considering buying 35 to 55 of the new radar-evading F-35 jets. No decisions are expected until late 2014 at the earliest.