Many NBC staffers are relieved that — after multiple terrifying security incidents — defenses have been reinforced at the “Today” show. As Page Six has previously reported, workers at the show were on edge after the horrifying kidnapping of its co-anchor Savannah Guthrie’s mom from her Arizona home in February. And then there was yet another scare in July when a crazed intruder breached security and got into the “Today” studios. But now we hear that multiple levels of fortress-like security have been installed at the 30 Rockefeller Center specifically to keep “Today” show staffers safe. “It’s a relief,” one insider told Page Six, “It was…
