nhk world's tomoko kamata reports. >> reporter: islamic state militants seized the strategic city a year ago. kurdish troops far outnumber the militants. but they've been dealing with another challenge. suicide bombers. a video by the militants shows how they conduct the attacks. they load a car with explosives. then they barrel into an enemy stronghold. the militants have been devising ways to give the attacks even more impact. they've been armoring their vehicles with thick iron plates. kurdish commanders say the militants used nearly 30 suicide trucks when they launched an assault on ramadi. then they stormed into the heart of the city. >> translator: it's really tough battling islamic state militants who are ready to die. we've never experienced fighting like this. >> reporter: kurdish military leaders say many of the people staging suicide attacks are foreigners. this chechen man tried and failed to blow up a car outside before he was captured. >> translator: i was told to bomb pagans. they taught me dying by suicide bomb has greater spiritual value than just dying in battle. >> rep

tomoko kamata, nhk world. >>> nhk has obtained a report by the international atomic energy agency on the nuclear accident at fukushima daiichi. three of the plant's six reactors melted down following the 2011 earthquake and tsunami. the report says japanese officials didn't do enough to prevent the disaster. the summary report was prepared by 180 scientists from more than 40 countries. the iaea board examined it this week before a final version is issued in september. the report says there were projections that a magnitude 8.3 quake would lead to tsunami measuring up to 15 meters high. it says officials at tokyo electric power take necessary precautions. the report also points out measures to prevent the flooding of emergency diesel generators were inadequate. they have proposed a period yachtic review of safety requirements. and also a scenario where multiple natural disasters dr simultaneously. >>> the decontamination team has a delay in a key initial step. officials from the government and tepco approved the revised plan. it refers to two important tasks. the removal of spent fuel

. >>> earlier "newsline"'s mickey yamamoto spoke with our tomoko kamata in the studio. >> what's behind this decision? >> well prime minister shinzo abe is determined to see the national security bills become law and soon. he promised the voters last september during the lower house election. he made a similar promise when he visited the united states in april. but deliberations in the diet are not going as smoothly as the ruling block had hoped. during the past few weeks, lawmakers have debated the constitutionality. some question whether they conform with article nine. the provision of the constitution which renounces war. the discussion became heated when members of a diet panel on the constitution held a meeting. panel members invited three legal experts to offer their opinions about the bills. all three including those invited by the ruling party said they are unconstitutional. they said using force for collective self-defense would violate the supreme law of the land. >> well members of abe's cabinet and ruling party members have dismissed those views. how do they explain the bill