President Donald Trump made a bold promise to America minutes after taking the Oath of Office: pledging that an American flag would be planted on Mars. "The United States will ... Mars," President Trump said. Elon Musk, CEO of SpaceX and newly installed ...

President Donald Trump vowed that U.S. astronauts would plant the American flag on Mars during his next administration. During his inaugural address on Monday, Trump insisted that going to Mars was part of the "manifest destiny" of the United States.

Elon Musk pumped his fists as he spoke at the Inauguration Day viewing party at Capital One arena. He celebrated Trump’s victory, calling it “really important” and highlighting the new president’s promise to plant the U.

There is debate about what gesture the tech billionaire meant to make at the Capital arena on Monday. Here's what people are saying.

The world’s richest man drew a ton of attention over an ill-advised ‘salute’ he did on stage, with many likening it to a Nazi gesture

Experts told Newsweek about the difficulties of reaching Mars as the United States faces complex challenges in space policy.