US President Donald Trump briefly laid out a case for a possible attack on Iran in his State of the Union speech to Congress, saying he would not allow what he called the world’s biggest sponsor of terrorism to obtain a nuclear weapon.Trump called Tehran’s support for militant groups, the killings of anti-government protesters in January and the country’s missile and nuclear programs threats to the region and the United States.For all the latest headlines, follow our Google News channel online or via the app.Here are some questions and answers about his statements:What exactly did Trump say about Iran’s weapons programs? Trump said that Iran had developed missiles that can threaten Europe and US bases overseas and is “working to build missiles that will soon reach the United States of America.” He said the US airstrikes he ordered last June known as Operation Midnight Hammer had “obliterated” Iran’s nuclear weapons program but Tehran was “starting it all over” and was “at this moment