I was on my way back home from Phoenix Arizona, standing in a super long line at the airport. Let’s face it, flying can be stressful, especially if you are not familiar with the airport and it is super early in the morning. I could not help but notice the TSA officer who was checking out the passengers’ boarding passes and IDs. He greeted each person with a big smile that was in his line! It was a pleasant change from my previous interactions with TSA officers when they only shouted “next!”. It has been said the smallest distance between two people is a smile. There are so many great reasons to share your smile with the world, read on! Here are top reasons to smile: It is a mood booster.