They have shown that no one can scare them,

It is wrong to make anyone into an enemy; it is wrong to scare the people of one's own country with that enemy and try to rally some allies on that basis.

These are Russian citizens, and they have no other motherland,

We are the world's number one partners in these spheres.

we might not ever need to look at that option, but its one of our options.

There was a large hole in the pressure hull around one-and-a-half meters to two meters, ... And now we know for sure that in result of the powerful blast, 75 or 80 percent of the crew died within 90 seconds since the submarine was at a so-called periscope depth at the moment, which implies that all the crew were at battle stations in the first two or three watertight compartments, and they were destroyed within 90 seconds of the blast.