Happy Valentine's Day! This traditional western holiday, dedicated to expressions of love and affection, has grown to be observed in many countries around the globe. As couples exchange traditional gifts of flowers and chocolate, they fuel a robust industry. In the United States alone, Valentine's Day spending is expected to reach $18.6 billion this year. Gathered here are images of this Valentine's Day from all around the world, including some scenes of the One Billion Rising campaign, a global collection of flash mobs and protests to raise awareness of violence against women.