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 1000 27.3500 D 831070.0000 D Common Stock 2007-12-14 4 S 0 600 27.3550 D 830470.0000 D Common Stock 2007-12-14 4 S 0 200 27.3590 D 830270.0000 D Common Stock 2007-12-14 4 S 0 1200 27.3600 D 829070.0000 D Common Stock 2007-12-14 4 S 0 300 27.3650 D 828770.0000 D Common Stock 2007-12-14 4 S 0 100 27.3680 D 828670.0000 D Common Stock 2007-12-14 4 S 0 100 27.3690 D 828570.0000 D Common Stock 2007-12-14 4 S 0 3700 27.3700 D 824870.0000 D Common Stock 2007-12-14 4 S 0 4500 27.3800 D 820370.0000 D Common Stock 2007-12-14 4 S 0 600 27.3850 D 819770.0000 D Common Stock 2007-12-14 4 S 0 10300 27.3900 D 809470.0000 D Common Stock 2007-12-14 4 S 0 100 27.3950 D 809370.0000 D Common Stock 2007-12-14 4 S 0 200 27.3980 D 809170.0000 D Common Stock 2007-12-14 4 S 0 20800 27.4000 D 788370.0000 D Common Stock 2007-12-14 4 S 0 300 27.4050 D 788070.0000 D Common Stock 2007-12-14 4 S 0 100 27.4080 D 787970.0000 D Common Stock 2007-12-14 4 S 0 2100 27.4100 D 785870.0000 D Common Stock 2007-12-14 4 S 0 100 27.4190 D 785770.0000 D Common Stock 2007-12-14 4 S 0 3000 27.4200 D 782770.0000 D Common Stock 2007-12-14 4 S 0 1400 27.4250 D 781370.0000 D Common Stock 2007-12-14 4 S 0 100 27.4290 D 781270.0000 D Common Stock 2007-12-14 4 S 0 14505 27.4300 D 766765.0000 D Common Stock 2007-12-14 4 S 0 200 27.4350 D 766565.0000 D Common Stock 2007-12-14 4 S 0 100 27.4380 D 766465.0000 D Common Stock 2007-12-14 4 S 0 4200 27.4400 D 762265.0000 D Common Stock 2007-12-14 4 S 0 3600 27.4450 D 758665.0000 D Common Stock 2007-12-14 4 S 0 100 27.4490 D 758565.0000 D Common Stock 2007-12-14 4 S 0 17000 27.4500 D 741565.0000 D Common Stock 2007-12-14 4 S 0 1800 27.4550 D 739765.0000 D Common Stock 2100.0000 I By Immediate Family This is form 6 of 10 for reporting Mr. Lord's transactions from December 14, 2007. By: Mary F. Eure (POA) 2007-12-18