A yellow jacket

Yesterday, I found a big bee at the net window in the northern room next to the sun room, where the laundry hunger space.
I went to close the window in the evening and found an incredible big bee buzzing on the net in the window.
I shut the window immediately and closed the way for the big bee to move in the room.
I went into the back yard and watched the bee from outside across the window net.
It was about the size of 3cm big  and the tail was yellow and black
I was very puzzled what to do...
I finally got to know it...a yellow jacket, the most dangerous kinds of bees!
It looked  for the place for their new house  in the neighbors.
It was unlucky for her to be found out and shut up in the narrow place.
I went to ask for help to the neighbor chairman but he was absent ...instead of him his wife helped me to spray and killed the yellow jacket at once.
I'm still uneasy if other ones would come back near my area...I don't want to see or kill them any more.  
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