I remember a guy in our unit a few years ago that faked a medal or two and also gave himself the rank of corporal. He was also nutty as a fruitcake and got out on a section 8 (or whatever it is called nowdays).
If Kerry did fake his own medals while Senator wouldn't that be an impeachble offence and shouldn't the House of Representives call up an Impeachment Procedure on him.
There are records from 1968 and 1969 regarding the awards. Kerry is in the Senate, they can remove him from the Senate. Legistalors are not "impeached" by Congress, only Executives and Judges are.
Senators and Representatives are not subject to impeachment.