Tragedy isn't a strong enough word to describe the worst mass shooting in American history in Orlando, Florida this weekend. Fifty people were killed and 53 wounded at the Pulse nightclub -- a venue with a mostly LGBT clintele.

The shooting combines the worst aspects of what we fear most -- terrorism and hatred of a specific group.

The suspected killer -- 29-year-old Omar Mateen -- called 911 to pledge his allegiance to the terrorist group ISIS.

Mateen's father was quoted as saying his son's Muslim faith had nothing to do with the shooting but that he was angered by seeing two men kissing.

Monday's Smart Talk will be devoted to issues related to the Orlando terrorist attacks. Among the guests to appear are Ted Martin, Executive Director of Equality PA and Dr. Michael Kenney, an expert on terrorism at the University of Pittsburgh.