简介：In April 2013, chaos erupted in Boston near the finish line of one of the world's oldest and most prestigious marathons. It was the worst terrorist attack on the United States since 9/11 and led to one of the most extensive and public manhunts in American history. Now, as the one-year anniversary approaches, National Geographic Channel presents a special two-hour event, Inside ...

简介：自由潜水冠军和专业安全潜水员似乎是天造地设的一对，尽管他们在自由潜水世界的巅峰相遇时选择了不同的道路。本片记录了在寂静的海洋深处追逐梦想时令人激动的回报，以及不可避免的风险。