If you believe the data provided by the Pentagon, for the specified time, the United States lost a total of 418 unmanned aerial vehicles. The greatest number of losses was recorded in the skies over Afghanistan and Iraq. A considerable number of accidents with UAVs occurred in the territory of the United States of America. The main reasons for the majority of accidents are the causes of the following nature: operator error, loss of communication signal. On the number of losses in the form of downed UAV data are not presented.
According to those who collected information, the loss of 32 drones per year (on average over the past 13 years) - this is an extremely negative indicator, indicating that American unmanned vehicles clearly need significant improvement.
The United States at this time occupy a confident first place in the world in the number of unmanned aerial vehicles used. By the number of accidents drone States are also ahead of the rest.