OKLAHOMA CITY (AP) — Keri Young locked eyes with her husband as they stood amid the starting line chaos of the kids' marathon with their 2-year-old.

"I'm probably going to cry through the whole thing," she said.

He nodded knowingly.

"I haven't cried for 48 hours," she said. "I'm due."

When the family decided months ago to do the kids' event at the Oklahoma City Memorial Marathon, the plan involved a fourth family member. Keri was pregnant and still would be on race day, so she and husband, Royce, wanted their hometown race to be their first with their newest addition.

Instead, it was in honor...