One of the largest hacker conferences in the world gets underway later this week.
It's called Defcon....and it attracts hackers, security professionals, developers, and all manner of computer geeks.
Among the presentations this year: new developments in password cracking, a spy plane that can intercept cell phone calls...
And software that can make your laptop battery catch on fire!
Dan Misener is our technology columnist.
Listen to his conversation with Jeanette: