Norway launches an investigation into why it took so long for police to get to the island. We'll talk to a survivor who was on the island when the gunman started shooting. And we'll also explore the online world where people with extreme views lurk.

And the NDP has a new leader. MP Nycole Turmel says she is "overwhelmed" by the support of her caucus colleagues to have her fill in for party leader Jack Layton while he battles cancer. We take a look at what the future holds for the party.

Plus, a new billboard warning Nascar fans of the dangers of hot dog consumption has some groups up in arms. Are the meaty treats health hazards, or a delicious part of American tradition?

Join us at 8 p.m. ET on CBC NN