The NAC-60 was North American Aviation's entry into the US Supersonic Transport program. It was essentially a modified version of their B-70 Valkyrie bomber design and retains a number of features from that aircraft, notably the high-mounted canard behind the cockpit area, and details of the engine area under the rear fuselage.
This image is a model found at the Delta Flight Museum, who have graciously released this image under the CC-by-SA.
Delta Flight Museum
CC BY-SA 4.0
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