First of all, the U.S. will be sending (uniformed) humans to Africa, Middle East, and such places. There are wars to be fought there, forget about space exploration.
And then, what's on Mars? For what reason would any country "send humans" to Mars specifically?
Finally, as a species we are clearly intellectually and consequently technologically unable to become what they call "space-faring".
On the bright side, at any second of any day we might be contacted by aliens who will be generous and kind to share their knowledge with us. Like in a movie.
Yeah I think that's our best bet for a bright future.