A wild, wild west wind

The wind worked pretty hard to get rid of our nice spring weather today.  Here it whips the United States and Kansas flags all around.  I wanted to get some motion blur on the flags, so I closed down the aperture as tightly as possible, and also reduced my ISO as low as it could go, to reduce my shutter speed and get some nice blur.  A neutral density filter is another way to block light in these situations.

Nikon D90
80mm - ISO 100
1/13s- f/36