“The Dust at Ground Zero” rebroadcasts a segment on how 9/11 searchers are suffering health problems due to dust at the former site of the World Trade Center. “Get Me the Geeks!” rebroadcasts a segment on the technicians who set up our sophisticated computer gadgets. “Pavarotti” rebroadcasts an interview with the opera singer to memorialize his recent death. “Andy Rooney” talks about statistics.