Beeman, your input would be especially appreciated. Here's the deal. A couple weeks ago I noticed when I turned our outside lights on to let the dogs out, these hornets would start attacking the lights. A few got in the house because they were hitting the light next to our back door which is only like a foot from the door opening. Couldn't find where they were coming from, so I utilized some African engineering and moved my bug zapper from the rear of our yard by the shed to the back corner of our house where the door is. I used an old vinyl-coated steel dog tie-out and strung it between two trees aout 6' off the ground and hung the bug zapper from it about 6 feet from the back door. I no longer turn on the back lights and just let the bug zapper run all night. Well, every morning I'd find some dead hornets in the grilles of the zapper and/or on the ground beneath it. I still kept looking for the nest. Well, I found it. They are going in under the siding/soffit at the back corner of the house. So, I bought 5 cans of good ol' foaming wasp/hornet killer. I climed up on an extension ladder and filled their entrance. I've done this for 3 days in a row and have been spraying any that show up and try to get back in after I foamed the opening. Today, I decided to check the attic. Didn't see any up there, but started futzing with something else and one flew past my head. I sprayed it, and couldn't find any more. The part of the attic at the back corner of the house isn't floored so I can't quite get over there. I am gonna go back up in a few minutes with a spotlight and two cans of spray take a good look. The spray cans shoot 20 feet, so I oughta be able to take them down if I spot a nest. Wish me luck. I'll be back shortly with a report. Any suggestions will be appreciated, in the meantime.