Inside a Gaza tunnel

Updated 8:32 AM ET, Wed July 22, 2015
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Israel Defense Forces took CNN correspondent Oren Liebermann into an elaborate Palestinian tunnel. CNN
Such tunnels play a key role in ongoing tensions. Israel says Hamas militants use them to launch attacks. IDF
The tunnel is wide enough to ride a motorcycle through it, and the IDF says troops found hidden weapons along its route. IDF
Israel is testing a new tunnel detection system but is tight-lipped on how it works. IDF
Israel is keeping its tunnel-detecting technology under wraps to avoid giving hints on how to counter it. IDF
For Israel, the tunnel detector could become as vital as its air missile defense system. IDF
Despite the new technology, Israeli officials say they think Hamas and other groups will continue building tunnels. And Israel will keep trying to find them. IDF