Washington says it was a tough decision and she sought advice from boyfriend Clayton Murphy, who left Akron early to go pro.
South Korea normally encourages North Koreans to defect, but wants to avoid confrontation during such a sensitive time.
Butler writes that Bach's opening remarks on the unified Korean team on at a recent press conference "produced a collective wave of nausea" in the media room.
They will compete in ockey, figure skating, short-track speed skating, cross country skiing and alpine skiing.
This despite objections from the South Korean coach who feels it will damage her players.
She was jailed for her part in the blacklisting of artists critical of the former president's government.
Costs will be reduced because many of the 2002 venues have been well maintained.
Dibaba is in the 1500 against former world indoor silver medalist Axumawit Embaye and Poland's European champ Angelika Cichocka. Kszczot is in the 900 against former world champ Mohamed Aman.
Dibaba was runner-up last year with 2:17:56, making her the third fastest all-time. Marathon debut record holder Guye Adola (2:03:46) and Stanley Biwott (2:03:51) were announced for the men's race.
It's anyone's guess what that actually means. Does the IAAF even know?