The Missouri River Outdoor Expo at Ponca State Park will celebrate America’s 250th anniversary Sept. 19-20 with more than 100 outdoor activities and a special lineup of Nebraska history speakers.
The free, family-friendly event will run from 9 a.m. to 5 p.m. both days. To celebrate America’s 250, Voices of Nebraska will run from 10 a.m. to 3:30 p.m. each day and feature eight Nebraska Humanities sp…