The Risks of a Manned Mission to Mars, Part VIII

Another risk that we should consider is the cost of the mission. A human mission to Mars is expected to cost around $100 billion. This money will come at the cost of more important NASA projects. Recently, NASA has stated that it doesn’t have enough funding to scan the solar system for potentially dangerous asteroids. According to NASA, any asteroid that is bigger than 460 feet in diameter poses a threat to Earth. So without the necessary funds, NASA can no longer track these asteroids to prevent Earth from destruction.

http://www.spacescan.org/entry/nasa-lacking-funds-to-protect-earth-from-killer-asteroids/