Maybe it really is different this time. The level of outrage at the latest mass shooting has a different more intense tone to it. Perhaps that’s because of the victims – particularly the 20 six- and seven-year-olds and six of their teachers. Or the timing. Or the fact that this is the seventh attack of its kind this year alone. Perhaps it's even because of the location a school which underscores the increasing sense of vulnerability felt by Americans simply trying to go about their ordinary lives and which joins a list from recent years as long and varied ...