This, this is Christ the King,
Whom shepherds guard and angels sing:
Haste, haste to bring Him laud,
The babe, the son of Mary.

Continuing a tradition begun last year, the US Air Force Band “flash mobbed” the Smithsonian and performed What Child is This? and Carol of the Bells, to the delight of the crowd:

The Air Force Times Flightlines blog noted that the official Air Force Band website said the first song was Greensleeves.  While Greensleeves is the same tune as What Child is This?, the vocalists were clearly singing the lyrics to the latter.

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