What are the exceptions to the 5th amendment double jeopardy rule in the Bill of Rights have

To the US Constitution prohibits anyone from being prosecuted twice for substantially the same crime.

No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a grand jury, except in cases arising in the land or naval forces, or in the militia, when in actual service in time of war or public danger; nor shall any person be subject for the same offense

Absolute !