. "1"^^ . . . . "The Martin 156, referred to in the press variously as the \"Russian Clipper\", \"Moscow Clipper\", or \"Soviet Clipper\" was a very large flying boat aircraft intended for trans-Pacific service. The single example of the M-156 was designed and built in response to a request from Pan American World Airways to provide a longer-range replacement for the Martin M-130."@en .