How do you separate two anchor points of a path in illustrator CS5?

To separate two anchor points of a path in Illustrator CS5, select the Direct Selection Tool (A) from the toolbar. Click on the anchor point you want to move, and then drag it away from the other anchor point. If you want to separate the points while maintaining the path's shape, you can hold down the Alt key (Option key on Mac) while dragging the anchor point. This allows you to adjust the handles independently if the points are part of a curve.