Where Can U.S. Find a Supercomputer?

The National Security Agency, it has been revealed, is examining millions of phone and e-mail transmissions of U.S. Citizens. The program uses a computer algorithm to scan millions of items to determine which needs a follow-up detailed investigation.

Which leads to the question: Where in the world does the U.S. government have a computer with the capability, storage capacity, and the speed to perform such a function?

It would require a supercomputer.