Over 15,000 naval personnel  from four countries are participating in a Joint Task Force Exercise  dubbed "Operation Brimstone", that is underway in  North Carolina and off the eastern U.S. coast from Virginia to Florida. The nine day exercise began Monday and includes special forces from France, Brazil and the United Kingdom. The large exercise comes barely a month after the Israeli air force conducted a massive exercise in the Mediterranean reportedly a rehearsal for a military strike on Iran's nuclear sites, and also shortly after the Geneva meeting where six world powers gave Iran yet another ultimatum of two weeks to suspend its uranium enrichment program. For the first time units of the