Why armed militia groups are surging across the nation

Today signifies 22 years since the Oklahoma City bombing, an attack carried out by Timothy McVeigh that left 168 dead. McVeigh sympathized with armed right-wing militia groups, which at the time, were surging in membership. But armed militias have long been active on the fringes of American society and continue to rise today. Special correspondent P.J. Tobia reports.