They have since been pushed into the Sea of Japan by a branch of the warm Kuroshio current that is running much closer to land than usual, and have spread up Japan's west coast and even through the Tsugaru strait between Japan's main island, Honshu, and northern Hokkaido into the Pacific Ocean.

ECONOMIST: A netful of trouble for Japanese fishermen

Lake Powell is huge -- 186 miles long, with 1, 960 miles of shoreline (more than the Pacific Ocean coastline from northern Washington to southern California).

FORBES: Fact and Comment

Officials from the North American Aerospace Defense Command (NORAD) and the U.S. Northern Command said the payload cleared Japanese airspace, but later fell into the Pacific Ocean.

CNN: Mystery over fate of N. Korean rocket