President jokes while signing space agency funding bill
21 March 2017 Last updated at 22:58 GMT
President Donald Trump joked that Nasa could send the US Congress to Mars as he signed a bill that guaranteed funding for the space agency for the next financial year.
The bill includes money to go towards a manned mission to Mars, Nasa's next big goal.
Despite this, the Nasa budget fell slightly, from $19.5bn ( £15.6bn) in 2017 to $19.1bn in 2018.