Sunken Cheonan Ship and Jeju Strait?

* Image source: Google
'Baengnyeong Island (sometimes spelled Baekryeong) is an island in Ongjin County, Incheon, South Korea located near the Northern Limit Line, …“ wikipedia.org'


* Image source: Google

One of the conservative right wing newspaper, Dong-A, along with Chosun, and Joongang(Samsung’s) making claim that “If the weapon that attacked the ship was not South Korean, no other country but North Korea would have attacked the Cheonan,” writes on May 7, 2010 as below:

What is left after the sinking’s cause is determined is how the South Korean government and military will respond. Seoul is preparing multifaceted countermeasures with its foreign, defense and unification ministries. Also necessary is diplomatic responses such as referring the matter to the U.N. Security Council and other international organizations and consideration of a strong military response to punish North Korea through agreement and cooperation with the U.S. Quite a few military measures are possible such as armed protests in the air and sea, the resumption of broadcasting to North Korea, and blocking North Korean civilian vessels from passing the Jeju Strait. Diplomatic responses will prove effective when military measures that make the North feel threatened are taken simultaneously.

The People say the North Korea has used the public sea of the Jeju strait for more than 10 years. If the Jeju strait is blocked for the North Korean use, the North Korea economy will be strangled. Is there any relationship between the sunken Cheonan ship accident and Jeju strait in the mind of the Ministry of the National Defense? Or is it the United States who wants to make connection of it? For whose interest is it? For whose profit is it?