If you own a nice home on a lake and a van full of senior citizens parks in your driveway, looking for a place to watch the Blue Angels airshow, do you tell them they’re trespassing and shoo them away? Art and Dorothy Oberto, owners of “America’s #1 Beef Jerky Company,” welcomed the seniors onto their waterfront property to see the show. And thus the Obertos began a yearly tradition of inviting seniors from local assisted-living homes into their home for Seattle’s Seafair airshow. They feed them a full spread of food, build a special ramp to help with wheelchairs and walkers, and provide tents and umbrellas for shade. The Obertos may keep this up only one more year as they plan to soon move themselves into senior housing.