50 years ago this week, part 3: TV news comes into its own

A "where were you when" moment is one that is an almost universal cultural touchstone, one where pretty much everyone who was alive at the moment in question remembers where they were and what they were doing when they first heard about a particular event.

The assassination of President John F. Kennedy was the first "where were you when" moment of the television age, and when most people recall that day, one of the things that they recall is the emergency news bulletin from CBS' soon-to-be legendary newscaster Walter Cronkite.