'Lone wolves' spotlighted in the fight against violent extremism

The White House this week hosts a summit on countering violent extremism, coincidentally just days after murderous attacks with multiple victims in the United States and Europe. Although the White House program has a broad mandate, recent events at first glance are connected to Islam: The shooting deaths last week of three young Muslims in Chapel Hill, N.C., by a suspect who may have been motivated by religious hatred as well as other issues, and the shooting attacks on a free speech event and a