while leaving behind cleaner emissions. it's how we make gasoline work harder for you. exxon and mobil. good morning. i'm alex witt. a helicopter crash in afghanistan has killed 31 nato troops along with seven afghan soldiers. president hamid karzai is claiming the 31 were u.s. special prayings forces. we'll get that cleared up. we know it is summertime, and it is very hot, but today at least 12 states across the south are seeing record temperatures well above the 100 degree mark. standard & poor's down grades the u.s. drit credit rating from triple-a to aa-plus. it is the first downgrade in history for the u.s. the s&p is saying congress's new deficit reduction plan does not go far enough. zirchl the downgrade means standard & poor's considers canada, france, and the u.k.