Archbishop Charles Chaput of Philadelphia is one of the best writers and preachers in the American hierarchy. Before coming to Philadelphia, he was archbishop in Denver, Colorado, and assisted at the funerals of a number of the Columbine victims. He recently wrote a very moving article on tragedy at Sandy Hook and the promise of Advent, which is well worth reading. A link to the article is below.
ZENIT - Advent, Suffering and the Promise of Joy