(CNN) -- A year ago Thursday, I-Report was born.
CNN.com launched its I-Report initiative August 2, 2006, in an effort to involve citizens in the newsgathering process.
Numerous milestones later, I-Report has grown and developed its ability to be an integral component of the network's coverage.
Mark Lacroix photographed the collapsed bridge from his apartment window.
On the eve of its anniversary, I-Reporters responded to yet another major news event: the deadly collapse of a bridge over the Mississippi river in Minneapolis, Minnesota.
Mark Lacroix sent photos of the scene immediately after the disaster. As the story developed, he provided information about the situation to viewers live on television.
Lacroix's photos were among the more than 450 I-Report submissions sent to CNN within the first 24 hours of the bridge's collapse -- the biggest response in one day to a single news event in I-Report history.
CNN.com readers have long been submitting photos and video, as well as speaking with CNN reporters, during major breaking news events. (Check out our timeline of I-Report milestones) »
On April 16, Jamal Albarghouti sent cell phone video of the Virginia Tech shooting in Blacksburg, Virginia, as the dramatic events were unfolding.
More recently, when fireballs began exploding from an industrial gas facility in Dallas, Texas, in July, I-Reporters wasted no time in recording video as smoke and debris rose into the air.
Justin Randall was in a convertible during the incident and tried to drive around blast debris on a highway. He sent video of the explosions, showing flames rising high into the air.
During a steam pipe explosion in New York, Jonathan Thompson sent video of a powerful surge of steam rising from the ground and rescuers scrambling to secure the area.
He followed up later that month by sending footage of repairs being made to the crater left behind. E-mail to a friend