bomber crew transport

while researching for the 'pave gat' thread, i came across this, in 'B-57 Canberra at war 1964-1972', "As the first B-57s came off the production line in june 1954, Martin proposed to the AF a 'Utility Courier' based on the basic Canberra airframe. A passenger compartment seated 6-11 extende...