Re the tunnels
"Hamas underground stronghold. Penetrating bombs versus deep tunnels
One of the IDF's tasks is
to destroy the underground stronghold of Hamas,
which is the tunnels that have been drilled over the years.
In order not to risk the lives of soldiers, they do it with the help of aviation.
These are
GBU-28 bombs developed in the USA in 1991 for Operation Desert Storm.
The Pentagon feared - rightly - that
the BLU-109/B bombs previously used to destroy bunkers would prove insufficient to destroy Saddam Hussein's best-protected bunkers.
Therefore, very quickly, in just a few weeks, new bombs were developed that were capable of destroying particularly
heavily fortified targets.
The GBU-28 C/B bomb was created on the basis of the unguided BLU-122 bomb.
It is laser guided, weighs just over 2.3 tons, and its
body is long and narrow, with a length of almost six meters and a diameter of only 38 cm.
The shape and reinforced body make the bomb - which has high kinetic energy due to its considerable mass - penetrate deep into the ground.
Its fuse was designed to initiate the explosion not immediately after impact, but with a delay.
This gives GBU-28 time to sink in, so
detonation occurs deep below the surface.
In practice, this allows you to destroy a target hidden under a layer of 50 meters of earth or protected by up to five meters of reinforced concrete.
The next generation of 'bunker busters' has already been developed in the United States -
the GBU-72 bomb of similar weight.
Israel has requested their supplies already in 2021 - before the end of tests of new weapons -
but no agreement has been reached so far."
Przez lata Hamas drążył pod ziemią rozległą sieć tuneli. Nawet wielometrowa warstwa ziemi nie zapewnia jednak bezpieczeństwa przed nowoczesną bronią przeznaczoną do niszczenia podziemnych umocnień. Wyjaśniamy...
tech.wp.pl
From my country's MSM