Despite the sound advice made by some of you, I went ahead with the operation "Sting First."
If you click the image you can get a better look. There are several hornets attached to the outside of the nest.
Although it's summer time in Atlanta, I put work gloves, a ski jacket with velcro sleves and a scarf--you know, to keep the hornets out of my jacket. I opened the window just high enough to get my arm out. Then I sprayed the entire can into the nest from about 4 feet away.
Hornets started streaming out of the nest. Some escaped and started hovering around. The operation was dicey there for a minute. There are still some hornets out that are not able to return to the nest.
From a downstairs window, some of the hornets can be seen. They are large and evil looking. You can see the stinger from a mile away.
Removal operations will commence on Monday.