The Edge here is observing the tenth anniversary of Kurt Cobain's death with an all-day marathon of Nirvana songs. They're also playing snippetts of old interviews with Nirvana and other artists talking about Kurt, and taking calls from listeners telling their stories about where they were and what they were doing when they heard the news. It's pretty damn cool.
Although, they have yet to play my request of "Molly's Lips". Grrr.