What to know about exploding pager attacks against Hezbollah

At least 12 Hezbollah militants were killed Tuesday by explosive devices allegedly hidden in pagers. The group is blaming Israel, but the Israelis have yet to comment on the attack. CBS News foreign correspondent Chris Livesay reports on the incident and Jon Alterman, vice president of the Center for Strategic and International Studies, joined CBS News to discuss how an attack like this could happen.