Disasters and homecomings: I-Report weekly highlights

(CNN) -- I-Report marked another big week after readers sent in some of the first images of a bridge that collapsed Wednesday, August 1, in Minneapolis, Minnesota.

The fall of the Interstate 35W bridge over the Mississippi River generated one of the greatest user responses CNN has seen since I-Report began one year ago this month.

Mark LaCroix was the first I-Reporter to send photos of the collapsed mass of concrete and twisted steel. He spoke with CNN's Wolf Blitzer later that evening and described watching from his apartment window as the bridge fell.

"I heard this massive rumbling, shaking basically," LaCroix said. "I looked out my window and saw the last few seconds of the collapse."

I-Reporter Ryan Broshar was riding his bike past the scene when he saw the bridge fall right in front of his eyes.

"I just heard a big 'boom,' and then there was dust everywhere! I pulled my bike over to the side of the road and looked over, and it was unreal," Broshar said. "People getting out of their cars unscathed, and people getting pulled out of their cars."

Jane Summerlin normally takes a different route home from work, but she decided she wanted to take the scenic route Wednesday.

Summerlin said she'll never forget the view she got when driving along the West River Parkway, which runs along the Mississippi River. She looked forward and saw what she could only describe as a "white thing" blocking her way.

After quickly pulling over, Summerlin realized the bridge had fallen, and a part of it had landed on West River Parkway.

"It was just a massive crumbling pile of concrete and rebar and steel," she said.

A tangled network of emergency vehicles and stuck cars blocked her way out. Camera in hand, she shot photos and video of the scene in different locations. Back at home, she looked out her 26th-floor apartment window and could see the fallen bridge in the distance.

The collapse wasn't the only story I-Reporters captured. Myke Goings sent a series of photos telling the story of the Waterloo, Iowa, homecoming of the Iowa Army National Guard's 1st Battalion, 133rd Infantry.

The unit served 17 months in Iraq, said Master Sgt. Duff McFadden of the Iowa National Guard. Two soldiers were killed in action, both by a roadside bomb, Radio Iowa reported.

Thomas Looper recorded video of smoke rising after two news helicopters crashed Friday in Phoenix, Arizona.

An air show crash in Dayton, Ohio, prompted several users to send photos and video, and readers sent several images of waterspouts and stormy weather. Eric Ghazal of Olympia, Washington, showed us the crash of a small plane, and Dana Hackley photographed a burst water main spraying a house in Pittsburgh, Pennsylvania.

Boris Bogatz of Sorsogon, Philippines, joined other I-Reporters who photographed the Mount Bulusan volcano spewing ash Tuesday.

Adam Brooks and Katie Mettee are two of the I-Reporters who photographed wildfire activity in Montana. From a helicopter, Aaron Olympius of Montgomery, Texas, shot photos of the scene near a wildfire in southern California.

On the lighter side, Mark Rader of Pittsboro, North Carolina, sent in an intriguing photo of an albino fawn in his yard Saturday. Twice-daily feedings bring more than a dozen deer to the yard, Rader said, adding that the albino fawn has only recently joined the pack. E-mail to a friend