Most artillery sites won't reach Seoul ... but at least 17 larger guns will
NK also has mobile artillery sites
NK artillery site can be hard to detect, hidden in passive defense structures
These structures could include secret sites right on top of the DMZ
There's also an intricate web of tunnels through the DMZ
NK might lead with a barrage dropping right near training events on the DMZ
Or try to immediately knock out missile defense
And try to set up for a nuclear attack, which the U.S. has vowed to stop
Meanwhile, NK has interlocking lines of anti aircraft guns
Behind these defenses, the hermit kingdom's capital of Pyongyang is a fortress
Now get an up close and personal look at ...