Hard Limestone News Today : Breaking News, Live Updates & Top Stories | Vimarsana

From lebanon into israel, and they say this tunnel was built by hezbollah for the express purpose of killing israelis. >> reporter: there's a secret in this hole, those responsible prefer you not to know. we drop a camera down past tens of meters of hard limestone to reveal a sophisticated tunnel complete with ventilation, lights. it's large enough for an nba player to stand in. srael says it's the work of hezbollah, the lebanese militant group with ties to iran. it was important for them to drill as close to this wall as possible, and that's because on the other side is lebanon. what they wan...

Let's bring in our correspondent ian lee live from jerusalem. ian, what more can you tell us about what you saw with regards to these tunnel s? >> reporter: well, george, israel takes these tunnels very seriously. even though we are about two weeks into this operation, they say that it could take weeks, if not months longer to search the entire border. but take a look at our exclusive look at one of their tunnels. there is a secret in this hole. those responsible prefer you not to know. we drop a camera down, past tens of meters of hard limestone to reveal a sophisticated tunnel, complete wi...