Now Playing: Famous Faces, Famous 'Sexpologies'

Now Playing: Gary Hart's Extramarital Mea Culpa

Now Playing: Grant on Affair: 'I Did a Bad Thing'

Now Playing: Louisiana Floods Continue After Historic Rainfall

Now Playing: Man Charged in Slaying of NYC Imam

Now Playing: Oregon Firefighters Capture 'Firenado' on Camera

Now Playing: Stingray Attacks on the Rise at California Beach

Now Playing: Suspect Arrested on 17 Counts of Arson in Calif. Wildfires

Now Playing: Napa Winemakers Use Unique Techniques to Battle Shifts in Climate

Now Playing: Dashcam Video Shows Car's Collision With City Bus

Now Playing: Atlanta Residents React to Teen's Death After Confronting 2 Men in Parking Lot

Now Playing: President Obama Declares Emergency in Louisiana Floods

Now Playing: Reports of Shots Fired at JFK Airport Prove False

Now Playing: Milwaukee Unrest Continues Through 2nd Night, 1 Person Reported Shot

Now Playing: Northern California Wildfire Forces 4,000 to Evacuate

Now Playing: Imam Murder 'Person of Interest' Being Questioned by NYPD

Now Playing: Chicago Cop's Son Shot Dead on Visit Home From College

Now Playing: Drone Flies Over Devastating Louisiana Flooding

Now Playing: Northern California Wildfire Reduces Streets to Smoldering Rubble, Destroys Over 175 Structures

Now Playing: Milwaukee to Enforce Curfew in Wake of Unrest