Sbprogramming

What do you think is the best invention ever?

They look pretty legit though https://datenretter.de/default.htm?language=1

Could the drives in 9/11 really be recovered as suggested here? https://www.youtube.com/watch?v=2R3QgmWstJA

Are you planning on going back if everything is safe in your homecountry and there is no necessity to stay?