LANHAM, Md. (WNEW) — For the second year in a row, the United State Air Force Band performed holiday music during a flash mob performance at the Air & Space Museum in D.C.

The performance began with a single oboe playing “Greensleeves”. That was soon joined by several more instruments and a chorus. Before the show was over, the band transitioned into another holiday favorite, “Carol of the Bells”.

According to a press release, the band began preparing the performance in July.

The music was taken through several read-through rehearsals and tweaked until the final composition was selected. The final practice included more than 100 military musicians and was held at the museum the night before the performance.

The audio from the performance was recorded through more than 40 different wireless microphone channels and nine different cameras at various locations and angles.

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