RunnerSpace Live brings you the rundown on what happened this week in the world of running.RSL Special Report: Columbia Episode 2LIVE This Weekend:Credit Union Cherry Blossom 10-Miler in Washington DCArcadia Invitational at ArcadiaInvitational.orgROAD RACING-International Paderborner Osterlauf 10K and Half Marathon in Germany-Daegu Marathon in Korea-Crescent City Classic 10K in Louisiana