> As to how the mere presence of a nuclear attack submarine can scare off an entire carrier group, I still don't understand. But then again I build web apps not

> As to how the mere presence of a nuclear attack submarine can scare off an entire carrier group, I still don't understand. But then again I build web apps not submarines. Escalation concerns - USA and Russia both really want to avoid direct conflicts to avoid escalation into nuclear war (and sometimes - as in this case - use that as a shield).