On a plane, a black passenger nervously scrutinizes an Arab-American passenger. In front of a store, a white woman clutches her purse as a black man walks by. In conversation, the topic of race comes up and both people wonder what they are willing to say-and what they are not. Each scenario reveals that how we act and react to each other on a daily basis stems from racial assumptions, biases, and misunderstandings. Some we acknowledge, others we overlook....