4 2007-12-14 0 0001032033 SLM 0001065138 8obutun$ 12061 Bluemont Way Reston VA 20190 1 1 0 0 Chairman & CEO Common Stock 2007-12-14 4 S 0 1700 27.7700 D 67870.0000 D Common Stock 2007-12-14 4 S 0 500 27.7800 D 67370.0000 D Common Stock 2007-12-14 4 S 0 100 27.7900 D 67270.0000 D Common Stock 2007-12-14 4 S 0 1200 27.7950 D 66070.0000 D Common Stock 2007-12-14 4 S 0 100 27.7960 D 65970.0000 D Common Stock 2007-12-14 4 S 0 3900 27.8000 D 62070.0000 D Common Stock 2007-12-14 4 S 0 100 27.8100 D 61970.0000 D Common Stock 2007-12-14 4 S 0 1100 27.8150 D 60870.0000 D Common Stock 2007-12-14 4 S 0 400 27.8200 D 60470.0000 D Common Stock 2007-12-14 4 S 0 5500 27.8300 D 54970.0000 D Common Stock 2007-12-14 4 S 0 100 27.8400 D 54870.0000 D Common Stock 2007-12-14 4 S 0 100 27.8450 D 54770.0000 D Common Stock 2007-12-14 4 S 0 1600 27.8600 D 53170.0000 D Common Stock 2007-12-14 4 S 0 100 27.8650 D 53070.0000 D Common Stock 2007-12-14 4 S 0 1000 27.8700 D 52070.0000 D Common Stock 2007-12-14 4 S 0 100 27.8770 D 51970.0000 D Common Stock 2007-12-14 4 S 0 100 27.8940 D 51870.0000 D Common Stock 2007-12-14 4 S 0 200 27.8950 D 51670.0000 D Common Stock 2007-12-14 4 S 0 100 27.8960 D 51570.0000 D Common Stock 2007-12-14 4 S 0 2300 27.9000 D 49270.0000 D Common Stock 2007-12-14 4 S 0 600 27.9050 D 48670.0000 D Common Stock 2007-12-14 4 S 0 100 27.9100 D 48570.0000 D Common Stock 2007-12-14 4 S 0 100 27.9190 D 48470.0000 D Common Stock 2007-12-14 4 S 0 100 27.9200 D 48370.0000 D Common Stock 2007-12-14 4 S 0 100 27.9280 D 48270.0000 D Common Stock 2007-12-14 4 S 0 300 27.9400 D 47970.0000 D Common Stock 2007-12-14 4 S 0 2183 27.9500 D 45787.0000 D Common Stock 2007-12-14 4 S 0 1100 27.9550 D 44687.0000 D Common Stock 2007-12-14 4 S 0 100 27.9900 D 44587.0000 D Common Stock 2100.0000 I By Immediate Family This is form 10 of 10 for reporting Mr. Lord's transactions from December 14, 2007. By: Mary F. Eure (POA) 2007-12-18