In the past week I have seen flowers and candles carpeting a street in Munich, the tranquility of a small Bavarian town shattered by a suicide bomb and a small church in suburban France sealed off after its octogenarian priest had his throat cut.
Before these horrific events, there was a knife-wieldingteenager on a German train. And before that, much deadlier attacks in Nice, Brussels and last November, in Paris.
This year has seen an accelerating pattern of attacks linked to ISIS in Europe and beyond -- from Turkey to Bangladesh, the United States to Indonesia. According to the group IntelCenter, which tracks acts of terrorism, there has been a significant attack directed or inspired by ISIS every 84 hours since June 8 in cities outside the war zones in Iraq, Syria, Sinai in Egypt and Libya. CNN's own tracking of attacks supports that conclusion. ...