Only 4 prototypes of the B1A were built. Later, 100 B1 B's were built and about 65 of these are still operational.
Yes, Produced with Vitamin B1. (palmitate, and mononitrate.
B12, B1, B2, B5 and some others
7,377 Lancaster bombers were built.
At the height of the Luftwaffe's power they had about 2,800 bombers. Almost all of these were what the Allies would class as 'light bombers'.
There are many single engine aircraft used as dive bombers and torpedo bombers that could be cited if this were the aim of the question - was it?
two
21
There were many. One of the most famous was Willow Run in Ypsilanti. They produced bombers there throughout the war. Many of the auto plants turned out tanks and jeeps as well as trucks.
3 u.s bombers disapeared during world war 2
No stealth bombers are on order. They already built all the Air Force could afford.
Approximately 8 A4 pages can fit onto a single B1 sheet.