Do I need a RE license to wholesale?

I'm looking at getting into wholesaling.  Do I need a RE license in order to wholesale?  If not, how do I get around this.  Do I need to take title to property at closing and then sell that same title at a different closing (double closing) to my buyer?  Thus, I actually own the property, even if its for just a short time?  Help me understand this.  Thanks.  I live in Missouri by the way.