10 year old tires ok for highway driving?

I know money is tight for most of us but it's just not worth chancing it. This is something that could pop and hurt nothing but it could also pop and kill you and/or others...I'd replace em. I have 2 on the back of my Concorde that I will be replacing soon for the same reason. I just replaced the fronts....Nexen N5000 225/60r16's. They are made by Michelin and ride real nice.