After well-coordinated terror attacks in two major cities in just four months, Europe is bracing for more. The death toll is now at least 34 and the number of injured more than 200 after yesterday's two bombing attacks on the Brussels airport and another downtown. Yesterday's strikes came despite the best efforts of multiple intelligence agencies since Paris was hit in November. Clearly, they weren't enough. Supposedly "unified" countries have opened their borders but failed to coordinate and share information. We look at the challenges to come and how terrorism in Europe is playing a role in America's presidential campaign.