first of all, there's data exfiltrations. for years, companies and as for -- government operatives in china come and take information, take intellectual capital, take pa tend -- neil: done that with our intelligence. >> creating an empire for themselves. neil: it's tick for tack. if you don't see your point, earlier in the break, you know, attack us, easily, we eventually find out who did it, we attack back. how do you respond to a hack attack? >> particularly, today, because the technology evolves almost minute-by-minute, and now you can spoof your address of where you are coming from, and there's a million different cutouts you can use to make sure you mask where you are coming from. the ns enu.s. are good at finding you, but, again, it's not a clear case of oh, this came from this person sitting here. neil: if you're not ashamed to say you're the syria electronic army, yao not coming from ireland. what's the purpose there? >> that's publicity. we can reach you across your ocean. neil: attack us, lob missiles at us, but we'

we try to stop, not only infiltration, but exfiltration, where sewage would actually leak out of the pipe. the head is larger, so it breaks away the old pipe and allows the new pipe to come in behind it. griffin: we are saving about 67% of the cost of actually digging old pipe up. clyne: it's less invasive than an open-cut process, where you would open the whole trench up and replace the pipe. it's called "trenchless" technology, so... that's as good as it gets. griffin: we don't have to dig up everyone's yard, and we refurbish that pipe at a much-reduced cost. another technique, the cured-in-place lining. it's equivalent to putting a large sock through the existing sewer. we form a new pipe inside the old pipe, and therefore we seal up all of the defects that allow rainwater to come in. hunter: we repair about 730 leaks a month in our system. griffin: the improvements that we've made will make the environment better. we had approximately 1,000 overflows occur in 1999. today, we've reduced overflows by 45% to 50%. and it's going to continue to improve as we go forward with the rehabi