So the Institute of Medicine proposed that residents be required to get five continuous hours of rest for every sixteen hours on duty.

VOA: special.2010.07.13

In another famous illustration, "The Army of the Potomac - A Sharp-Shooter on Picket Duty."

VOA: special.2010.07.25

Each day,thousands of Americans are called to serve on jury duty.

VOA: special.2009.08.31

Speaking at the vigil, New York City Mayor Michael Bloomberg said it is the "sacred duty" of New Yorkers to carry on the memories of those lost.

VOA: standard.2009.09.11

U.S.Army Sergeant Jeremy Tormala, on his second tour of duty in Iraq, thought the elections gave a good indication that Iraqi forces will be up to the task.

VOA: standard.2010.03.08