Another Korean war?

The BBC has an article about the latest idiocy by North Korea:

North Korea has fired shells into disputed waters near a South Korean warship, South Korean media report. The incident took place near Yeonpyeong Island, which lies on the disputed western maritime border, Yonhap news agency said.
Recently, South Korea fired warning shots at three North Korean ships that crossed the maritime border. The North had said it would retaliate.
In 2010, North Korean shelling of Yeonpyeong killed four people.
The incident happened after 18:00 local time, reports citing South Korean officials said.
"The shells fell near our ship which has been on regular patrol in our territory, but it did not cause any damage to our ship," a spokesman from South Korea's defense ministry told the Agence-France Presse news agency.
Local television network YTN reported that residents on Yeonpyeong were being evacuated to bomb shelters.
Both countries regularly conduct drills near the western sea border, which has long been a flashpoint between the two Koreas. The UN drew the border after the Korean War, but North Korea has never recognized it. In March, the two countries traded artillery fire across the border.
North Korea killed two civilians and two marines in the 2010 shelling of Yeonpyeong, which it said was in response to South Korean military exercises.
Earlier that year, a South Korean warship sank near Baengnyeong island, leaving 46 people dead. Seoul says Pyongyang torpedoed the vessel, but North Korea denies any role in the incident.

Rico says the last time we had to save their butts, it cost us thirty-four thousand lives; this time, we nuke 'em...