bosteel group is based in shanghai. company executives say the new will be about 60 million tons a year overtaking japan's two companies among others. china accounts for arrange half of all global steel output. analysts say the country's exports from excess production are hurting competitors overseas. the chinese government is pushing the industry to consolidate. the two companies say they're going to streamline factories an reduce inefficiencies once the merger is complete. experts are calling it the biggest cyber breach ever. yahoo says hackers stole information for at least 500 million user accounts from its networks in 2014, officials at the american it giants say a recent investigation uncovered the hack, they say the stolen data likely includes names, telephone numbers and dates of birth of people around the world. yahoo is asking affected users to immediately change their pass words and they want all customers to do so if they haven't made the change since 2014. the company blames what they call a state spocnsore