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ST. LOUIS, MO (KTVI)- It’s going to be a busy week downtown.  The National Rifle Association Convention starts Wednesday.  The Blues also host playoff games Thursday and Saturday.  And the Cards home opener is Friday against the Cubs.

Of all of those events, the biggest security headache promises to be the NRA.

GOP presidential candidates, complete with secret service protection, will address the 60,000 convention-goers Friday as the Cardinal’s play their home opener.

The city is most worried about NRA members who may leave guns in their parked cars.

New city regulations require an attendant to be at every parking lot as long as any cars are parked there.

Officer patrols will also be increased.