A police or parole officer with a battering ram wanting to gain access to an apartment would seem to be a pretty good test of the integrity of a door and lock system. This door was on an apartment, it is set into the steel commercial frame in a masonry wall. The ram actually tore the steel surface of the door in one spot, it was obviously multiple blows and the deadbolt held, the door is trash and there is damage to the striker plate inside.
If this was your door and the person trying to gain entry was not a law enforcement officer with a warrant they would look for either an easier access point or another target. Even the officers gave up on this one before gaining entry. The neighbors were all well aware of the attempt well before they gave up. If they were not obviously law enforcement officers the nearest neighbor said she would have called 911. (She should have called anyway since there is always the possibility that they were not really law enforcement),
A strong door, set in a strong frame with a good lock can make a difference between someone entering your home or not.