He died of congestive heart failure in Washington , D.C. , on February 18 , 2007 .
In 2003 , Snowden was honored at the White House as a recipient of the National Humanities Medal .
Snowden died of congestive heart failure in Washington , D.C. , on February 18 , 2007 .
In 2003 , Snowden was honored at the White House as a recipient of the National Humanities Medal .