Almost 24 bomb-sniffing canines were brought to the Newark Liberty International Airport on Sunday, in efforts to bolster security ahead of Super Bowl Sunday.

Officials from the Transportation Security Administration who spoke with the Associated Press showed reporters ways the dogs detected various kinds of explosives using their highly trained sense of smell. This particular group of dogs were trained to sit down when picking up the scent of a bomb, to avoid creating a scene or drawing attention to a particular person.

According to TSA spokesperson Lisa Farbstein, the canines go through 12 weeks of specialty training with specific trainers. Farbstein told AP that these dogs are most often of either Lab mix or Labrador descent. 

LaGuardia and John F. Kennedy airports haven't added more bomb-sniffing dogs, AP reported.

Large events like this weekend's Super Bowl XLVIII attract heightened crime and risk levels. 

New Jersey governor Chris Christie announced earlier this week that state police were cracking down on human traffickers. 

"We have eyes and ears on the ground and in cyber space," Christie told the group assembled at the security center in the Meadowlands. "We are watching the Internet and we are watching the neighborhoods all across this area. And if you do try it, expect that you will likely be caught...We're committed to this fight, especially this week."

Human trafficking crimes reportedly spike in numbers during the Super Bowl.