While Colorado's Amendment 64 passed, allowing possession of marijuana, federal laws
prohibit interstate transportation of pot.

Denver International Airport will be the first Denver facility to prohibit marijuana possession on all of its property as it attempts to combat illegal interstate trafficking in the face of federal law.

An airport spokes person said, “We didn't want to impact other airports and other agencies, and we didn't want to facilitate transporting marijuana across state lines."

 

The Transportation Security Administration is a U.S. government agency.  The state's pot legalization doesn't impact its policies or how it will implement security checks at Denver.
Security dogs are trained to sniff out explosives or safety hazards, not drugs.

 

See the full story in the Denver Post