<p>STOCKHOLM, Sweden — Swedish authorities Saturday were investigating how a man calling himself a "stateless American" ended up floating on a raft of oil barrels and wood planks in the waters between Denmark and Norway.</p>
<p>The man — who carried no identification, spoke perfect English and said his name was George Williams — was found by a Norwegian oil tanker on Friday morning, floating in the Skagerak sea on a raft of four oil barrels held together by a frame of wooden planks.</p>