The NAB SHOW got underway this weekend in LAS VEGAS with smaller crowds, vaccination or testing requirements, and a full day of sessions on radio-related topics on SUNDAY (4/24).RADIO ADVERTISING BUREAU Pres./CEO ERICA FARBER brought the traditional opening session from the old NAB/RAB RADIO SHOW, "What Business Are You In?." to the newly-merged NAB SHOW, asking that question of four prominent radio operators, who mostly gave individual presentations on how their companies have .