US president Barack Obama has tried to ease the biggest crisis of his presidency, acknowledging missteps with his signature healthcare law. Photograph:  Michael Francis McElroy/Getty Images.

US president Barack Obama has tried to ease the biggest crisis of his presidency, acknowledging missteps with his signature healthcare law and announc(...)

Warren Buffet once said that, if he was given $1 billion and asked to beat Coca-Cola, he would hand back the money, because it simply couldn’t (...)