The Oklahoma City sonic boom tests, also known as Operation Bongo II, refer to a controversial experiment, organised by the Federal Aviation Administration (FAA), in which 1,253 sonic booms were generated over Oklahoma City, Oklahoma, over a period of six months from February 1964. The experiment was intended to quantify the effects of transcontinental supersonic transport (SST) aircraft on a city, to measure the booms' effect on structures and public attitude, and to develop standards for boom prediction and insurance data.