Here's what we know about the mass shooting that left at least 15 people dead. And, authorities found director Rob Reiner and his wife, Michele, dead in their Los Angeles home.

The Brown University community was devastated after a deadly shooting at an engineering building left two people dead and eight others wounded.

The Sydney and Brown University attacks have one other thing in common: Both quickly become dragged into the politics of a bitter, divided time, as partisans saw each through the prism of their own ideology and bitter disputes.