How hard are concrete walls to get through with explosives? Is a hand grenade enough or do you need a breaching charge like on the video games like call of duty modern warfare 2? Don't try this at home!
Here is link to Pommijätkät video from the same day fipost.info/show/videot/2LqhxIGFaXiIhXQ.html
Link to Perustava FIpost channel for more concrete stuff fipost.info/camera/gooHpBSNYX-CSUxTUxeuYQ.html