A plane takes off in Houston, Texas, its mission to prevent the spread of West Nile Virus.<br/> <br />Authorities here began aerial spraying on Wednesday after finding the virus killed three Houston residents.<br/> <br />The virus was also found in 300 mosquito samples and nearly 100 dead birds.<br/> <br />The plane will spray insecticide over the city for five hours in an effort to kill mosquitos responsible for spreading the deadly disease.
