U.S. President Donald Trump has called on NASA to resume manned lunar missions by 2024, and is asking Congress for a $1.6 billion boost to the space agency's budget. But American scientists are already setting their sights on getting astronauts to Mars. CGTN's Giles Gibson has more.

Code: SPORTDX. Promo code is required. Discount is applied only to a certain category of goods.

More videos