Chemtrails: On a clear day, what are we seeing?

POSTED: 5:00 PM PDT April 25, 2013    UPDATED: 7:18 PM PDT April 25, 2013 
Chemtrails: On a clear day, what are we seeing?

In a special report, NewsChannel 21's Nina Mehlhaf investigates the debate over the contrails that criss-cross the sky, and what they're about.