The Redskins are looking for a new stadium, and the Chargers are also trying to get a new stadium.
Sun Life Stadium is getting renovated.
http://www.miamidolphins.com/newstadium.html
Georgia Dome was built in 1993 and Turner Field was built for the Olympics in 1996. Edward Jones Dome in St. Louis will be 20 years old next year I think.