[Dr. Aaron Lerner - IMRA: It's fantastic that we will be able to detect
tunnel digging activities - but since under "quiet for quiet" we have
permitted Hamas to tunnel to their heart's content without interference up
until now one can only wonder what tunnels ALREADY EXIST and thus cannot be
detected via sensors that can detect tunneling activity.
And this leads to the next very painful question: are we also thinking
about how to handle the EXISTING tunnels or are we ignoring this issue
because the public and politicians can be satisfied knowing that we have
gizmos to detect tunneling and given our 2 second attention span we don’t
spend enough time pondering the subject to even think that the sensors can't
pick up existing tunnels.]

Israel Tests Tunnel Detection
TEL AVIV [MENL] -- Israel has overseen the development of a system that
detect and destroy enemy tunnels.
The Israeli Defense Ministry has been working with the United States to
develop a cross-border tunnel detection system. Israeli sources said the
system, dubbed "Underground Iron Dome," underwent testing in 2016 near the
border with the Hamas-ruled Gaza Strip.
"We are doing a lot, but many of [the things we do] are hidden from the
public," Israeli Chief of Staff Lt. Gen. Gadi Eisenkot said.
The sources said the development of the system took more than a decade
but was accelerated over the last two years. They said the Defense Ministry
was working with Israeli companies to design seismic sensors that could
identify digging.
Two of the leading Israeli contractors in the anti-tunnel project were
identified as the state-owned Rafael Advanced Defense Systems and the
publicly-traded Elbit Systems. Neither company has discussed the project.
The sources said Israel spent more than $250 million since the project
was launched in 2004. They said Washington has allocated $40 million in
fiscal 2016 and could do the same over the subsequent two years.
"We have dozens, if not a hundred, engineering vehicles on the Gaza
border," Eisenkot said.

http://www.menewsline.com/article-1173,36600-Israel-Tests-Tunnel-Detection.aspx