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TAMPA, Florida (AP) - It probably soundslike downtown Tampa is under attack Wednesday afternoon. But don't worry, it's just a drill.

A combined Special Operations force from MacDill Air Forceis demonstrating its combat capabilities outside the Tampa Convention Center, starting at 1 p.m. And organizers say it's going to get loud.

The show of force also includes special operations teams from Australia, Brazil, Canada, Colombia, Jordan, Norway, Poland, Thailand and United Arab Emirates.

The drill will be a hostage-rescue scenario and include a CV-22 Osprey tilt-rotor aircraft demonstration and a variety of other advanced military technology. The public is encouraged to watch from behind a perimeter set up by police.

The drill comes less than 100 days before 50,000 visitors come to Tampa for the Republican National Convention.