Should NASA Go to Mars?

On the 40th anniversary of the moon landing a quick question?

Do you think we should try to attempt a manned mission to Mars? And if so do you think it will happen in our lifetime, next 20-40 years?

It would be massively expensive but I think it would be exciting as well. The sci-fi fan in my would love it.

I remember reading an article years ago about all the technology that came from the space program in general and the moon missions in particular. it was really mind boggling. i think that mars missions would provide similar new tech

thoughts?