Summary: May 2011 was the deadliest month for Afghan civilians since the war began shortly after the terrorist attack of September 11, 2001, with 368 civilians killed and 593 wounded, according to a U.N. midyear civilian casualty report. … One-year retrospective: One year ago today, on June 14, 2010, Aubrey Immelman reported that in 1916 President Woodrow Wilson issued a proclamation establishing June 14 as Flag Day, and that President Harry Truman made it official in 1949 when he signed legislation designating June 14 of each year as National Flag Day.