Some Chicago Boyz know each other from student days at the University of Chicago. Others are Chicago boys in spirit. The blog name is also intended as a good-humored gesture of admiration for distinguished Chicago School economists and fellow travelers.
Miscaptioned. That is a P-47D-5-RE, not a D-1,.
Note that the aircraft is not capable of dropping those tanks, these are fixed ferry tanks. This is one of a group of 10 P-47D-5-RE fresh off the line being ferried to the UK over July-August 1943. One of the aircraft ground looped at BW-1 in Iceland, the rest arrived in Prestwick over 11/12 August 1943. This aircraft is one of the first 12 P-47 built that were capable of taking a combat drop tank, only on the belly, not the wings. This development was at the request of VIII Air Technical Services in UK, who had developed the necessary tank pressurisation system in July 1943. The ATS kit was used to convert P-47 and P-51 in ETO to take combat drop tanks and a similar system installed in US production or conversion centres before shipment from July 1943.