Yet,when a musician played with Duke Ellington, he usually stayed, sometimes for many years.

VOA: special.2010.08.15

Eight years into the Afghan war, Afghan troops and their U.S.advisers have settled into a sometimes tense relationship.

VOA: standard.2009.12.13

He says in recent years the United States has sometimes failed to live up to that responsibility.

VOA: standard.2009.05.23