U.S. fights Zika mosquitoes with limited arsenal
Over Wynwood, the Miami neighborhood where Zika gained a foothold in the continental United States, low flying planes have been spraying naled, a tightly controlled pesticide often used as a last resort. It appears to be working, killing at least 90 percent of the target mosquitoes. Across the Biscayne Bay in Miami Beach, wind and high-rise buildings make aerial spraying challenging.