GMA star Amy Robach has revealed the "pain" and "determination" that went into her Berlin marathon run with a series of pictures.MORE: Amy Robach shares emotional cancer news with happy photoThe news anchor called on fans to zoom into the pictures to see their faces, which told the true story of how they felt in those moments.WATCH: Amy Robach shares sneak peek inside her incredible home as she gives it the ultimate makeover"A picture tells a thousand words! So cool that the @berlinmarathon took