Edison (US): Donald Trump has asserted that the US needs to be “very careful” about radical Islamic terror and “extreme vetting” must be done before allowing people in to the country, a controversial stand taken by the Republican presidential nominee that has made immigrants jittery. Outlining his policy to tackle terrorism, the 70-year-old billionaire said, “We have to be very, very careful (about radical Islamic terror). We have to have extreme vetting before we let people in… We want people to come in to the country but they have to come in legally.” “Something is going on that’s not positive force. We are going to be looking very much at certain areas of the world. We have to very careful with radical Islamic terror. We can be politically correct and say it doesn’t matter but it does matter,” he told NDTV.