This is the real crescent moon. You can check it out any night in the sky.

http://www.adventuresinastrophotography.com/2008/04/12/waxing-crescent-m...

This is the red crescent (equivalent to red cross) symbol:

http://www.redcrescent.org/

Lets try to highlight the differences...
:-)

War looking for peace,
is like fornication looking for virginity.