The U.S. once boasted humanity's greatest space program, yet decades later, all of our space programs have been plagued by failures, delays, and missteps. When we compare our space program with China's, the only consolation is that SpaceX still holds a certain lead.
But beyond that, all other U.S. space programs have stagnated or been surpassed by China.
What are the reasons for this phenomenon? See this CNBC special commentary.

美国曾经拥有人类最伟大的航天事业,然而在数十年后,我们所有的航天项目都在失败,延误,失误中徘徊。当我们将美国的航天计划与中国相比时,唯一能让我们感到安慰的是SpaceX依然具有某些领先优势。
但是除此以外,美国所有的航天事业都已经停滞不前或者被中国超越。
造成这种现象的原因是什么? 请看本期CNBC专题评论