Hong Kong discovers gold bars from U.S. are fake!

It is claimed that as many as 1.5 million 400-oz gold bars were replaced at Fort Knox during the Clinton Admin with tungsten bars covered with a thin gold plate. The first 'salted bars' were discovered in Hong Kong a month ago. Article 1. Article 2.
The bars were held and delivered from London and believed to be from the ETF-GLD, which received them from the US government.