1.   Because of a long lunch with the visitors, the submarine was running behind schedule, and was rushing to make up time.

2.   Tensions have run high on the Korean Peninsula since a North Korean infiltration submarine ran aground in South Korea last month.

3.   That submarine ran aground on the South Korean coast, apparently while trying to drop off armed commandos, and the crew and commandos all slipped ashore.

4.   Brig. Gen. Shin Sang-gil told reporters the captured intruder said the submarine ran aground two days after it left the northern port of Wonsan.

5.   Tensions have been heightened on the Korean peninsula since North Korean soldiers came ashore last week after their submarine ran aground in South Korea.

6.   The submarine was running behind schedule at the time.

7.   A North Korean submarine ran aground last Wednesday on the east coast of South Korea.

8.   After the North Korean submarine ran aground in the south, Perry called for restraint by both North and South Korea, reportedly ruffling feathers in Seoul.

9.   Earlier on Tuesday, another unidentified small vessel was found stranded on Kangnung Beach where a North Korean submarine ran aground last September, a police spokesman said.

10.   Earlier on Tuesday, another unidentified small vessel was found stranded on Kangnung Beach where the North Korean submarine ran aground, a police spokesman said.