It seems the US Air Force is looking for better ways to climb walls in combat zones. As part of their quest, they approached a number of universities, seeking ideas and offering funding for promising projects. Utah State University responded with this ingenious device, using a vacuum cleaner motor to power suction devices. It's said to work amazingly well on many different types of surface.
The USAF was impressed enough to cough up $100,000 to fund ongoing research. According to Business Insider, one of the goals is to produce a much quieter system so as not to alert an enemy inside a building that someone's climbing up the outside.
Congratulations to the 'Ascending Aggies' of Utah State U. for a very clever idea. I'll look forward to seeing whether they can develop it into a practical military solution.