He calls his enterprise "Million Mile Walker," which is both a pun (his name, after all, is Mark Walker) and a description of a decades-long journey that has taken him all over the world, always searching for ways to improve the lives of people less fortunate than himself.

SoftPower/FulStories uses first-person stories to explore why U.S. engagement in the world matters. Through conversations with diplomats, aid workers, Peace Corps volunteers, authors and artists, influencers, businesspeople, and more, SP/FS highlights how soft power and foreign aid and assistance strengthen America's security, prosperity, and global standing.