North Korean attacks: What is Obama doing?

Yesterday the North Koreans fired artillery shells on a disputed island held by South Korea--killing two South Korean marines.

Although it's difficult to ascertain motives of the mysterious "Hermit Kingdom," it's fair to wonder: Are the Norks testing the determined-weakness policy of President Obama?

Earlier this year the North sank a South Korean ship--killing 46. And the North Korean nuclear program continues.

There are 28,000 American troops serving in South Korea.

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