Captain, British 22^nd Special Air Service Regiment\n\n John Price joined the infantry at the age of sixteen and has served in the British Army for eighteen years.

Navy Veteran Calvin Leon Graham became the youngest World War II soldier at the age of 12, and the youngest recipient of the Purple Heart and Bronze Star. During World War II, it was not unusual for American boys to lie about their age in order to enlist.

Decreased sunlight can cause drops in your body's production of serotonin, a brain chemical that helps to determine mood. Lack of light can also alter the brain's balance of melatonin, a chemical produced during the hours of darkness that helps to govern sleep patterns and mood.

We are affected a great deal by being more tired. And it's very much due to our physiological processes in the body. The sleep hormone we have called melatonin is secreted in the body when it's dark.