4 2008-08-08 0 0001032033 SLM 0001065142 vp9xu$jg 12061 Bluemont Way Reston VA 20190 1 0 0 0 Common Stock 2008-08-08 4 S 0 230856 16.6743 D 3670.0000 D Common Stock 687771.0000 I By Limited Partnerships Upon request by the Commission staff or a security holder of the issuer, full information regarding the number of shares sold at each separate price will be provided. Represents the weighted average price per share of stock sold by Mr. Porter between $16.83 and $16.50. By: Mary F. Eure (POA) 2008-08-08