"Before he became the president, Barack Obama was a little boy called Barry. Amid a happy childhood in Hawaii and Indonesia, he also yearned for a better understanding of Black history and culture, and a better sense of his own identity as a Black American. Spurred by conversations around race, injustice, and inequality, he became a community organizer, practiced civil rights law, and was elected to the US Senate. "Yes we can!" became a rallying cry...