NBC Nightly News

Brand loyalty: It's why we buy a lot of what we buy, and any company that sells anything is striving to induce that feeling in its potential customers. Last week, research consultancy Brand Keys revealed which American companies do it best.

TV news analyst Andrew Tyndall tracks every minute of airtime spent by the three nightly network news broadcasts. So which stories garnered the most airtime on each network?

Last year, Vivian Schiller was a well-regarded executive in charge of the digital operations of the New York Times Co. (NYT). She was so happy with her job that she welled up with emotion when she told her boss Arthur Sulzberger that she was leaving to become the chief executive of National Public...