In the swampy wetlands of southern Mexico, officials and researchers are struggling to explain the deaths of dozens of manatees. Local fisherman are blaming polluted waterways and say something needs to be done. Colette Luke has more.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!