Public television stations in Washington and elsewhere will be broadcasting live the wedding of Prince William and Catherine Middleton for several hours on Friday, April 29. And if you need more background on the happy couple, they will also broadcast a documentary, “William and Kate: The Royal Wedding,” in the weeks leading up to the big day.

Now some churlish republicans might say that our ancestors fought and died just so we didn’t have to pay attention to the comings and goings of royalty. But I say it’s just this sort of live, breaking-news, current affairs coverage for which we need public broadcasting. Without PBS, where could Americans watch the handsome young prince take the beautiful commoner to be his wife? I mean, other than ABC, NBC, CBS, CNN, Fox, MSNBC, TLC, BBC America, and YouTube?

As they used to say, If PBS doesn’t do it, who will?