The US National Academy of Engineering has published a list of Grand Challenges for Engineering. Ths US National Committee on Theoretical and Applied Mechanics is interested in developing a discussion on the implications of these Grand Challenges to the Mechanics community.
Zhigang Suo posted a link to this: node/2908; this post will be on the top of the front page for the foreseeable future in to keep this on the "front burner" and to promote discussions within the community. Please look into these Grand Challenge problems and provide your input on this page. Zhigang and I will moderate these discussions and then integrate and distill our thoughts over time.