The Washington Times-Herald    Cellist Yo-Yo Ma, right, waits
for his cue with pianist Gabriela Montero, left, during the
first inauguration ceremonies for Barack Obama on Jan. 20, 2009.
Since it was impossible to play live under the freezing weather
conditions that day, the artists prerecorded the music and then
performed to a playback, a decision that generated some
controversy.