That doesn't make sense because enriching uranium is the most difficult part, and manpower and resources were germanys weakest points. There may have been some uranium stolen, but likely far too little in german possesion to build a bomb. Let alone several to test and then drop. I think german phisysists understood the concept, and german engineers were capable of designing one. But I don't think they had enough time or resources to see it through during an active war.