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 the Hunt for the Boston Bombers. 　　译文(2): 2013年4月，世界上最古老、最负盛名的马拉松之一的终点线附近，波士顿爆发了混乱。这是自9\/11以来美国遭受的最严重的恐怖袭击，并导致了美国历史上最广泛和最公开的搜捕行动之一。现在，随着一周年纪念日的临近，国家地理频道推出了一个特别的两小时活动，内部寻找波士顿轰炸机。