[U. S. Army engineers practicing erection and disassembly of a portable bridge, Fort Belvoir, Virginia]

[Mayor Fiorello LaGuardia conducting]

[Mayor Fiorello LaGuardia conducting]

[Mayor Fiorello LaGuardia sitting at a table, surrounded by people]

Roland de Margerie

[Nurse giving patient a shot]

[Man looking through newspaper]

[Oscar Swanson racking balls that have been completely assembled and tested]