NASA employs many people. I worked there once myself. That there are crackpots and other less-than-credible folks working there is not only not surprising, but something I witnessed first hand. Despite popular culture's imagery, NASA is not some elite group of the world's finest intellects. It is really no more big a deal than working for a giant military contractor. In fact, most of the workers at NASA do work for a giant military contractor.

That said, I have nothing to offer on the actual subject at hand - the validity of the claims.