Going to Mars

We either muster the courage to go

Or we risk the possibility of stagnation and decay - Robert Zubrin

It has been years since Earthlings visited the moon, or even left the secure confines of the area around the Earth. Recently, NASA announced another planned mission to mars expected to launch on  November 18th. Space.com has this to say about the launch:

The Mars Atmosphere and Volatile Evolution spacecraft, or Maven for short, is due to lift off from Florida's Cape Canaveral Air Force Station on Nov. 18. Maven is designed to study the Red Planet's upper atmosphere in great detail, and mission scientists hope the probe's observations yield insights into how Mars shifted from a relatively warm, wet world in the ancient past to the cold and dry place we know today.

"The Maven mission is a significant step toward unraveling the planetary puzzle about Mars' past and present environments," NASA science chief John Grunsfeld said in a statement. "The knowledge we gain will build on past and current missions examining Mars and will help inform future missions to send humans to Mars.

It brings us to my question. Do you think that humans are technologically capable of going to Mars? What kind of  problems do you think we would face on our journey to the Red Planet?