http://www.reuters.com/article/us-northkorea-usa-japan-idUSKBN17P01Y
North Korea said on Sunday it was ready to sink a U.S. aircraft carrier to demonstrate its military might, as two Japanese navy ships joined a U.S. carrier group for exercises in the western Pacific.
U.S. President Donald Trump ordered the USS Carl Vinson carrier strike group to sail to waters off the Korean peninsula in response to rising tension over the North's nuclear and missile tests, and its threats to attack the United States and its Asian allies.
The United States has not specified where the carrier strike group is as it approaches the area. U.S. Vice President Mike Pence said on Saturday it would arrive "within days" but gave no other details.
North Korea remained defiant.
"Our revolutionary forces are combat-ready to sink a U.S. nuclear powered aircraft carrier with a single strike," the Rodong Sinmun, the newspaper of the North's ruling Workers' Party, said in a commentary.
The paper likened the aircraft carrier to a "gross animal" and said a strike on it would be "an actual example to show our military's force".
North Korea says its nuclear program is for self-defense and has warned the United States of a nuclear attack in response to any aggression. It has also threatened to lay waste to South Korea and Japan.
U.S. Defense Secretary Jim Mattis said on Friday North Korea's recent statements were provocative but had proven to be hollow in the past and should not be trusted.
"We've all come to hear their words repeatedly, their word has not proven honest," Mattis told a news conference in Tel Aviv, before the latest threat to the aircraft carrier.
Japan's show of naval force reflects growing concern that North Korea could strike it with nuclear or chemical warheads.
Some Japanese ruling party lawmakers are urging Prime Minister Shinzo Abe to acquire strike weapons that could hit North Korean missile forces before any imminent attack.