Law enforcement will be on high alert this Fourth of July weekend from coast-to-coast over fears ISIS supporters in the United States may heed the group's call to carry out attacks.
"The threat stream is very high. In fact, we don't think it's been this high since 9/11," Los Angeles Police Deputy Chief Michael Downing told KABC TV.
The Los Angeles Police Department, as well as local law enforcement across the country, are on heightened alert, increasing security measures as concern grows of radical extremists in the U.S.
Melissa Swailes—whose husband, Officer David Swailes of the LAPD, died by suicide in February 2016—discusses the day of David's death.