On Tue, 09 Oct 2007 14:52:35 GMT, "john hawkins"
wrote in
:

Based on historical FAA performance on modernization, what makes anyone
think that ADS-B will be ready to be implemented by 2020 or even 2050?

The contract recently signed with ITT to implement ADS-B nationally
presumably contains a performance clause and penalty for failure to
meet milestone dates.