Cold, wintry weather brings risk for pets as well as people.

The U.S. government is preparing to breed billions of flies and drop them from airplanes over Mexico and even southern Texas.

CNN VideoAt least 35 passengers were wounded when an Air Canada flight on its way to Sydney encountered severe turbulence, the airline said. After leaving Vancouver on Thursday, Air Canada flight 33 was forced to land at the Daniel K. Inouye International Airport in Honolulu, the airline said. "We just hit turbulence pretty quick. Lots of people hit the ceiling, lots of screaming," passenger Michael Bailey told CNN affiliate KHNL/KGMB. The flight, which was carrying 269 passengers and 15 crew members, was about two hours past Hawaii when it hit "unforecasted and sudden turbulence," the airline said.