On August 4th and 5th, the Museum of Flight will be holding the “Need for Speed” Festival, a celebration of Seafair and the Blue Angels, in its East parking lot on Boeing Field. In addition, speedy boats, cars, and planes will be on display. The festival is open 10 am to 5 pm each day, with food, a beer garden, souvenirs, kids activities, and music. The festival is free with admission to the museum. Look here for more info.