The Amazing Race 20 is the twentieth installment of the reality television show The Amazing Race. The Amazing Race 20 features eleven teams of two, each with a pre-existing relationship, in a race around the world.
National Geographic goes inside the operations of Customs and Border Protections and Homeland Security Investigations at JFK airport - the busiest international airport in the USA.
人类最伟大的工程壮举往往是最强大的武器。直升机、隐身技术、枪、炸弹、飞机等,这些都是战斗工具。它们甚至还为战场上的胜利提供了关键性的优势,本节目将带观众深入了解最伟大的军事工程创举……了解它们的运作方式,产生过程以及它们是如何在战场上发挥作用的。
