Not a rocket per se, but a bunch of artillery pieces. S. Korean president threatening to retaliate if they do it again. I don't want to see this escalate, but how much provocation can the south (and us as an ally) take? Nothing was done after the North sank that ship recently, and now this? If China doesnt rein N Korea in, this could be very bad, for some reason they choose to sit back, I assume that China is testing our commitment to the south asia/pacific rim?