Possible Clues:

• One's heart a prisoner in this?
• In fury, business group withdraws guard for lights, etc?
• Presumably, this was opened to get the First Lady out to start a new life with kid from lock-up
• Tease about lack of youth and bony frame
• Chest protector, of sorts
• Protector of the heart
• Organ case, adapted rice bag
• Protector of internal organs
• Bone structure that may be broken in big race
• Skeleton section