Surviving the catastrophe

Ok... just in case Sarah Palin given all her Foreign Policy Expertise manages to create worldwide chaos, I'm ready with solar cooker plans...

Here are a few that I want to try. Wonder if they get hot enough to cook a Fred's steak?
http://solarcooking.wikia.com/wiki/Windshield_Shade_Solar_Cooker
http://solarcooking.wikia.com/wiki/%22Minimum%22_Solar_Box_Cooker