Unearthing a piece of history - very carefully.<br/> <br />Japanese soldiers lift an unexploded firebomb - thought to be 60 years old - from a construction site in downtown Tokyo.<br/> <br />Officials believe it was dropped by the United States during the waning days of the Second World War.<br/> <br />Police cordoned off a wide section of the Japanese capital - fearful the bomb would detonate.<br/> <br />(SOUNDBITE) (Japanese) TOSHIHITO TAKAHASHI, JAPANESE SELF DEFENSE FORCE UNEXPLODED ORDINANCE DISPOSAL DIVISION, SAYING:<br/> <br />"There are highly flammable chemicals inside the bomb, and they're designed to create fires in the area they're dispersed."<br/> <br />In the months before Japan's surrender in 1945, the U.S. firebombed Tokyo, razing much of the capital and killing more than 100,000 people.