The events of Boston shook the nation. A day marked as "the best day in Boston", Patriots Day, schools were out, the Red Sox were playing, runners from around the world had gathered... it was a big day, a beautiful day, an Americana day.
When the first plane hit the first tower on 9/11 the nation gasped at this terrible accident. Then the second plane hit and the realization sunk in. Similarly, the first bomb went off and spectators, runners, and news media couldn't believe the tragedy of a man hole cover/gas explosion/accident... and then 20 seconds later that dark realization of the world we live in reared its head once more.
There will always be evil. Evil people, evil deeds, evil consequences. But whenever evil people come out from the shadows, good people, courageous people rise up to meet them. When evil atrocities are committed, amazing acts of kindness and love can immediately be found in the still smoking embers. Before the evil (full of cowardice) can even slink back into the night, love, goodness, courageous are already running to the epicenter to pick up the pieces and prepare for tomorrow.
"The world is full of evil and terrible things, but fear not, I have conquered the world"