Public enemy it to describe various notorious fugitives they were pursuing throughout the 1930s. Unlike Loesch's use of the term, the FBI's "Public Enemies" were wanted criminals and fugitives who were already charged with crimes. Among the criminals whom the FBI called "public enemies" were John Dillinger, Baby Face Nelson, Bonnie and Clyde, Pretty Boy Floyd, Machine Gun Kelly, Ma Barker, and Alvin Karpis. The term was used so extensively during the 1930s that some writers call that period of the FBI's early (the BOI became the FBI in 1935) history the "Public Enemy Era". Dillinger, Floyd, Nelson, and Karpis, in that
Sido S.1 Sido S.1 The Sido S.1 was a Polish two seat, parasol wing trainer aircraft, first flown in 1930. In the late 1920s the LOPP issued a requirement for a low cost, club trainer. In 1929 the Sido S.1 was designed in response by the amateur Józef Sido, who was a student at the Mining Academy in Kraków. Positive reactions from both LOPP and the Kraków Academic Aeroclub led to the parallel construction of three airframes in the workshops of the local Air Regiment, differing primarily in their engines. The first, powered by a Cirrus III inline, flew for the first