Question:  Henry Eugene "Red" Erwin, Sr. is a recipient of the Medal of Honor which he earned aboard a heavy bomber whose design exceeded the cost of what?
Sentence (from "Boeing B-29 Superfortress"): Including design and production, it was the single most expensive weapons project undertaken by the United States in World War II, exceeding the cost of the Manhattan Project by between $1 and 1.7 billion.
Relevant evidence: Yes