Tom Clements, 58, was gunned down on Tuesday evening as he was called to the front door of his home near the city of Colorado Springs, officials said.

BBC: Colorado prisons chief Tom Clements shot dead

To prove that such a plan can work, Hughes has lashed together an elaborate network in the Old Colorado City historic section of Colorado Springs, Colorado.

FORBES: Digital Spin

The Waldo Canyon Fire captured attention because of its proximity to landmarks such as Pikes Peak and the Air Force Academy, and also to Colorado Springs, a city of about 400, 000, the state's second largest.

CNN: Crews go on offensive against growing Colorado wildfire

The information from Twitter comes from all sorts of places: from official agencies such as the Colorado Springs Fire Department to people in and near the city sharing what they're witnessing with other people around the state and the nation.

CNN: New app tracks Colorado wildfires