To celebrate the launch of TIME’s new multimedia project – 100 Photographs: The Most Influential Images of All Time – we asked leaders in a number of fields, from technology to the arts to business, to share the single photograph that most influenced their lives. Purchase the 100 Photographs book now.

I saw it while I was stranded in Tokyo. Never before have I been fearful or worried about living in New York. That day changed my life forever.

Martha Stewart is an entrepreneur, lifestyle expert and best-selling author.