I still believe it is from the troop deployments. A lot of families move back home when their husbands and wives go off to war for a year or more. Also, a lot of people have moved across the river to Lee County. At this time, Lee County isn't part of Columbus' MSA. Also, there are many smaller units at Fort Benning that are deployed as well which could push that number up to 5000+. Columbus is doing well, it just looks bad because of the deployments and migration to Lee County because it is affordable. The 2010 census will probably knock everyone's socks off because the troops will be back and BRAC will be kicking in. Also, Lee County might become part of the MSA at that time.