low risk

No-fly lists aren't the only way authorities in Canada and the United States are trying to deal with the threat of aviation terrorism.

Another strategy is the joint Canadian-U.S. NEXUS traveller program, which allows low-risk travellers to cross the border more easily -- as long as they're willing to submit to a background check and provide fingerprints and other personal data.

NEXUS air, highway and marine programs were consolidated last month into a single "trusted traveller" program. NEXUS, which started in 2002, now has more than 110,000 members in Canada and the U.S.