I haven’t heard the full story on what has happen with the attempted terrorist attack Christmas day. However, in the wake of what has happen airport security has been increased.
For flights from Canada to the USA no carry on bags will be accepted with the exception of:
• Small purses
• Items for the care of small children
• Laptop computers
At the time airlines are checking carry-on bags free of charge. But do double check before departing.
If you are flying anytime soon you arrive with plenty of spare. More than 3 hours if you are flying international, more than 2 hours if flying national or domestic. You now need to factor in the increase security checks as well as the holiday crowds.
Edit: For those who are like me and didnt hear the details of what happen. Here is an article written by the Telegraph (UK),