in sicily flames were lapping at the edges of the palermo airport forcing it to shut down. all fueled by high winds and extreme heat scorching southern italy. so what actually caused the fires? drone video shows a man biking in the woods allegedly starting a fire. he sees the camera and starts throwing rocks at it. it turns out arson is a big problem in this area. local leaders say arson was behind 80% of the wildfires in this region. it is so bad they arrested 22 arsonists just last year. what about greece? scorching temperatures have engulfed fueling dozens of wildfires. they have displaced more than 30,000 people. greece has had 700 fires this summers end greek officials say most of the fires have been started intentionally. we don t know what motivates arsonists.