Why Americans in Canada renounce citizenship

2 Air Canada pilots killed in collision with ground vehicle at New York's LaGuardia airport. 

Incident at LaGuardia heightens concerns about air travel safety in the US. 

US President Donald Trump says talks with Iran are productive, extends 48-hour deadline to open Strait of Hormuz to 5 days. 

Tax lawyers who help American-Canadians renounce their citizenship say they're seeing increased interest. 

Supreme Court of Canada begins hearing into Quebec's use of notwithstanding clause to protect its Bill 21 secularism law. 

3 months after Australia banned anyone under age 16 from accessing social media -- is it working?