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Vipers from the 138th Fighter Wing are headed your way this Thursday, April 30 for a flyover salute to Oklahoma’s front-line healthcare heroes, first responders and essential employees.Check this out tomorrow, Thurs, April 30: OSU Medical Center – 2:58 p.m. St. John’s Medical Center/Hillcrest Medical Center–2:59p St. Francis Hospital, Main – 3:00 p.m. St. Francis…