While clouds initially hung low over the Hillsboro airfield into early Saturday afternoon, the dozen or so performers at the 2010 Oregon International Airshow eagerly took to the sky to strut their stuff. Tens of thousands turned out not only on Saturday but through the weekend to watch a multitude of acts from Julie Clark to the Harrier, the A-10 West demo team to the Flying Tenor. The Patriots, the country’s only civilian jet team, were Hillsboro’s headlining act this year.