text: Former Energy Department official and CAP Senior Fellow Joseph Romm suggests that recent 90-degree weather in Minnesota could have critically weakened the bridge, causing it to collapse. Even if Mr. Romm were correct about global warming contributing to the failure of critical infrastructure, this leads us to an even more pressing question: who built all the freeway overpasses in Phoenix? What about the parking structures at McCarran Airport? Wither the above ground facilities at Groom Lake? If several days of summer weather in the mid-90s can cause a massive steel and concrete structure to collapse, somebody better send a memo the those crazy architects in Dubai.