This 4-time Boston Marathon champ is taking on 7 events at the Rio Paralympics

CLARKSVILLE, Md. — Growing up on a dead-end street in suburbia, Tatyana and Hannah McFadden raced their wheelchairs up, down and all around. Their family challenged cul-de-sac convention, but also fit right in.

Two moms, three children, a grandmother and two dogs. A basketball hoop in the driveway. Purple wheelchairs scattered throughout the garage. Sports equipment, and prosthetic legs, stuffed into cramped closets.

“It’s been just such an amazing year,” Debbie McFadden said, standing alongside her daughters on the backyard patio. Dozens of camera phones clicked. The buttercream on the sheet cake told the rest of the story: “Tatyana & Hannah Go for the Gold!” was written in red script across the icing, and two tiny wheelchairs raced on a fondant track.