Florida residents are furious as scientists prepare to release hundreds of millions of genetically modified mosquitoes into their communities.
The experiment, led by British biotech company Oxitec, will see around 750 million male mosquitoes sent out into the Florida Keys over the next two years in an attempt to control the population of an invasive, disease carrying species which has settled in the area.
But many residents are unhappy at being part of what one group called "a Jurassic Park experiment."
The first wave of the project will see thousands of mosquitoes released at six locations this week.
The project has been launched to combat the Aedes aegypti mosquito, which makes up about four per cent of the mosquito population in the Keys but is responsible for virtually all mosquito-borne diseases transmitted to humans, including dengue, Zika and yellow fever. It can also transmit heartworm and other potentially deadly illnesses to pets and animals.