A U.S. Customs and Border Patrol officer sits in his jeep monitoring the border fence between Tijuana, Mexico and San Ysidro, California, March 1, 2013. Labor unions are bargaining with federal government agencies in an attempt to soften the financial blow on federal employees as $85 billion in spending cuts kick in. Some agencies, such as Customs and Border Protection, the Internal Revenue Service and the Environmental Protection Agency have notified workers they may have to take several unpaid days off work. REUTERS/Mike Blake (UNITED STATES - Tags: POLITICS CRIME LAW BUSINESS EMPLOYMENT) - RTR3EGK2
The US government has devoted a lot of resources to sealing the US-Mexican border. But just how effective has the build-up been, and what is the best way to measure it? Host Marco Werman speaks with Edward Alden, a senior fellow at the Council on Foreign Relations, who has been researching these questions.