sentences:  They were used by the 1º and 2º Esquadrões (1st and 2nd Squadrons) of 6º Grupo de Aviação (6th Aviation Group), based at Recife, for search and rescue and photo-reconnaissance until 1968.Canada received six Flying Fortresses (three B-17Es and three B-17Fs) which flew 240 trans-Atlantic mail flights from Canada to Canadian troops serving in Europe from 6 December 1943 to 27 December 1946.All six belonged to no.