Barack Obama wiped away tears at the White House as he expressed grief over the children killed in the Connecticut massacre and promised "meaningful action" to prevent similar shooting rampages in the future. Obama has promised to act on gun control after earlier shooting incidents but subsequently done nothing implement any changes. Over the last four years of his presidency, restrictions on guns – in particular concealed weapons – have become more relaxed and gun sales soared. There have been five major shooting sprees since he has been president, three of them this year. This one is different because the...