ABC News -- ABC News' Sunlen Miller reports: Calling Thursdays shooting in Fort Hood, Texas one of the most devastating ever committed on an American military base, President Obama said that while the worst of human nature was on full display the best of America was also shown that day. Even as we saw the worst of human nature on full display, we also saw the best of America, President Obama said in his weekly address, We saw soldiers and civilians alike rushing to aid fallen comrades; tearing off bullet-riddled clothes to treat the injured; using blouses as tourniquets; taking down the shooter even as they bore wounds themselves. Mr. Obama said that the soldiers valor and selfless reaction to the shooting make all of us proud to be Americans, as...