http://explorethecanyon.com/airsweeps/
You can only enter the Sweepstakes 6 times and there is a limit of 12 entries per household.
The Prize.
The Sponsor will provide a Nikon D3100 camera and ship to the winners address. If a Nikon D3100 is not available at time of sweepstakes draw, a similar quality camera will be provided.
The Sponsor will provide IMAX tickets for two to see Grand Canyon: The Movie in IMAX at the National Geographic Visitor Center.
The Sponsor will provide 1 DVD copy of Grand Canyon: The Hidden Secrets and ship to the winners address.
The Total Approximate Retail Value of the prize is $400 (U.S.), but actual value may vary depending on costs at the time of booking, the value of services rendered and products provided at time of travel. Airfare is not included.