Photos: Lightning over Chicago -- Chicago Tribune
Lightning | Voltage, Causes, & Facts | Britannica
Watch simultaneous lightning strikes illuminate Chicago's sky
Scientists capture the first ever footage of ball lightning | Daily Mail Online
Chicago Triple Lightning Strikes to Sears, Trump, Hancock - June 30 - YouTube
Lightning lit up the Chicago skyline as thunderstorms rolled through and struck four skyscrapers | Daily Mail Online
One strike, you're out! Take me (safely!) out to the ball game | Vaisala
Ian Wall's photographs of lightning storms goes viral - Chicago Sun-Times
Massive lightning strikes Chicago skyscraper - YouTube
Triple lightning strikes on Chicago's three tallest buildings, and an overall skyscraper lightning bonanza - June 30, 2014
Does Ball Lightning Exist? | Britannica
Can Lightning Strike the Same Place Twice? | Britannica
Image of rare triple lightning bolt captured over Chicago's night sky | Fox Weather
EAS Scenario #3: Chicago Lightning Ball - YouTube
Massive lightning strikes Chicago skyscraper - YouTube
Lightning | Voltage, Causes, & Facts | Britannica
Man struck by lightning on video in Woodbridge, New Jersey - CBS News
Image of rare triple lightning bolt captured over Chicago's night sky | Fox Weather
Triple lightning strikes on Chicago's three tallest buildings, and an overall skyscraper lightning bonanza - June 30, 2014
Ian Wall's photographs of lightning storms goes viral - Chicago Sun-Times
The Proof Is Out There: Unexplained Lightning Phenomenon Caught On Camera (Season 1) | History - YouTube
Ball lightning - Wikipedia
Ball lightning - Wikipedia
Strange Ball Lightning Caught on High-Speed Video
