man: right now, we're at the bottom of the rockdale construction shaft. we're 310 feet below grade, deep under atlanta in hard rock. in the downtown area of atlanta, the sewer system and the stormwater system are combined and there are overflows during storm events, and so the purpose of this system is to relieve that flow, take it into the tunnel, transport it to a brand-new treatment plant, clean up the chattahoochee river. narrator: instead of the combined sewage overflowing into the river, it will flow into this tunnel that acts as a storage tank. the water will then slowly empty into the new plant for treatment before it's released back into the river. man: the system in total is about 8 1/2 miles, 27 feet in diameter. most of the time it will be dry. the only time it will fill is when the sewer system is overwhelmed by the storm. it is a massive project. we've worked about a million and a half man-hours. hunter: it is an incredible amount of work. our capital program right now is $3.9 billion. over a period of less than 10 years. franklin: so it's v

here in middleton, a town in rockdale, outside manchester, it's up here in northern england.ace inside london. no one thought for one minute it actually came from this street. the family of lee rigby, just a short distance from here, they've asked for us to respect their privacy. some of the neighbors around here are prepared to speak, and they've been telling us about how they came across this news, and what their feelings were when they first heard it. take a listen. when you heard earlier today that this guy was a local, and an officer here, what went through your mind? >> it made me sad when i realized who it was. devastated. to think it was one of my neighbors. >> what's been the reaction of the local community here? >> shock. >> as i said, the family haven't been prepared to speak to us. but they have issued a statement, this coming from the ministry of defense in britain. they say this, all he wanted to do when he was a boy was to be in the army. he wanted to live life, to enjoy himself. his family meant everything to him. he was a loving son, husband, father, brother,