after law school, it was the peace corps, then the diplomatic corps, serving in places like riyad and jerusalem. his cultural wisdom was well respected back in washington, both as an idealist and a realist. >> chris stevens was not unaware of the danger that he faced. he was privy to intelligence information and others. but he went forward and did his job with a smile, love of his country and love of the country where he was serving. >> his family knew the risks, too. steven mcdonald with his a close college friend. >> just remember his mom saying, why are you going over there anyway? and he said, well, mother, to help the libyan people and to represent united states interests in this country. >> such a waste. >> diplomats by their very nature are unsung, serving far from home in sometimes remote and hostile outlets. the average american rarely knows their names. we know one now, and a nation mourns. for "cbs this morning," i'm lee cowan in los angeles. >>> now these anti-american protests have triggered a sharp exchange between president obama and governor mitt romney. on tuesday, th