Choose Wisely
From Halopedia, the Halo wiki
<youtube width="200" height="167">5TMhVqz7Alc</youtube>
Choose Wisely is a song included in the Halo 3: Original Soundtrack.
The song starts on a single note, followed by a choir melody. The orchestra continues its accompaniment, then choir gets louder and continues its melody (Note: This choir melody is the same as the beginning of the Halo 3 Announcement Trailer). It plays in the Main Menu of Halo 3 randomly.
It runs for exactly 1 minute and 19.046 seconds (1:19.046).