On Georg Elser planted a bomb Bürgerbräukeller(I've been quite nice) the bomb was in a pillar which would've have been right behind Hitler during his speech recognizing the 16th anniversary of the Munich Putsch. He worked for nearly a year on his plan, and spent nearly three months in Munich building his bomb and setting everything in motion. He snuck in the beer hall every night for a month hollowing out the pillar making sure the clean up any mess he made, he set the bomb in place on a November 5th it was due to go off at 8:21 PM on November 8th just as he planned. Hitler had left for Berlin 13 minutes earlier, he wanted to be back in Berlin that night but it was too foggy to fly so he left earlier on a train.
What if it wasn't foggy that night?