these envoys strive always to strike the right note. tracy smith will be reporting our sunday morning cover story. the highway to heaven reporter: diplomacy never sounded so good. when the u.s. government really wants to wow people overseas, they ll send in the band. are there times when a musician can do your job better than you can? well, i think that there are certainly times when music conveys american values better than a speech. reporter: america s musical ambassadors later on sunday morning. osgood: frame to frame is a holiday look at a greatly loved american artist. and the inspiration he provided to a pair of film makers. rita braver will be tracking the connections. reporter: when you compare this 1935 norman rockwell painting to a shot of indiana jones, you begin to understand george lucas and steven spielberg s fascination with the artist s work. he got a rockwell so i went out and got a bigger rockwell. then i went out and go two more. reporter: