Small flickering oil lamps known as diyas are lighting up Indian homes in South Asian communities around the globe on Sunday as hundreds of millions of people observe Diwali.
Otherwise known as the Festival of Lights, it's a religious celebration of self-awareness and reflection. Diwali is a public holiday in a number of other nations, but it's not nearly so well-known in the U.S., where families must rely on themselves to keep the tradition alive.