A suspected unexploded bomb has been found at the site of the Fukushima nuclear plant in Japan. The US is thought to have dropped the 89 cm-long device during World War-II. <br/><br/>It is found by workers building a car park at the site where a four-decade-long decommissioning process is under way.<br/><br/>Tens of thousands of residents had to evacuate the area after a reactor meltdown in 2011 following an earthquake and tsunami. <br/><br/>The incident at the Tokyo Electric Power Co (Tepco) site was the world's most serious nuclear accident since Chernobyl in 1986. <br/><br/>No-one died directly in the meltdown but three former Tepco executives are facing trial on charges of negligence because of deaths related to the area's evacuation.