plant operator kyushu electric decided in april to decommission the facility. the move came following a regulation limiting the life span of reactors to 40 years in principle. officials will submit the plan to the nuclear regulation authority. they say it will take 28 years to complete the decommissioning. the plant operators in japan have already decided to scrap five reactors over 40 years old. kyushu electric will be the first to submit such a plan. >>> a vehicle packed with explosives blew up near an american military base in afghanistan killing six u.s. soldiers. the taliban has claimed responsibility, saying it carried out a suicide attack. the blast occurred on monday near bagram air base. afghanistan's defense ministry said six others were wounded, including u.s. soldiers and afghan police officers. local authorities said the bombing hit a joint patrol by both countries' forces. most of the u.s. led international combat troops withdrew from afghanistan last year. the progress of training the military and police has been slow. taliban militants have been

the study looked at the nankai trough on the pacific coast from tokai to kyushu in western japan. it found swaying in buildings would be much worse if a quake struck this area. and experts say the nankai trough is overdue for a big jolt. if a earthquake hit this area, it could produce what scientists called long period ground motion. that means ground movement during an earthquake that causes vibrations that last a long time. earthquakes causing short quake ground vibrations did not generate intense swaying. but long period ground motion causes intense swaying in high-rise buildings. inside, there's lots of damage. the march 2011 earthquake that hit northern japan did this in this is a video from a restaurant in a high-rise. the skyscraper in tokyo swayed slowly. the megaquake generated long period of motion. the swaying does not die down even in areas far from the epicenter. it is a huge concern for this disaster relief expert. >> translator: there can be more than 1,000 people in each skyscraper. several million people could be affected by the swaying. if they are hit by heavy o