Officials with the U.S. Fish and Wildlife Service said there is a wildfire burning at the Merritt Island National Refuge south of the Kennedy Space Center. Refuge spokesman Dorn Whitmore said fire crews and three fire engines are at the 50-acre wildfire which is located about 1.5 miles south of the vehicle assembly building. Whitmore said the fire is quickly moving north and producing heavy smoke as it burns in an oak brush area of the preserve. He could not confirm how long it will take to knock down the blaze.