A woman grieves at her husband's memorial at the South Tower Memorial Pool during memorial observances on the 13th anniversary of the Sept. 11, 2001 terror attacks on the World Trade Center in New York, Thursday, Sept. 11, 2014. Family and friends of those who died read the names of the nearly 3,000 people killed in New York, at the Pentagon and near Shanksville, Penn. (AP Photo/The New York Times, Chang W. Lee, Pool) / TT / kod 436 Foto: Chang W. Lee

Er det én ting vi bør lære av terroren, så er det dette