At least five people required medical attention, including one pregnant woman who was trampled, after hundreds of people began running to apply for housing assistance vouchers early Thursday morning. Dallas County residents hoping to secure a Dallas County Health and Human Services housing voucher began lining up on Polk Street outside of the Jessie Owens Memorial Complex at 4:30 p.m. Wednesday. The vouchers provide up to $1,000 each month to put toward rent for low income families. By 5 a.m. Thursday, that number had grown substantially and as many as 15,000 applications were expected, according to Dallas Fire-Rescue's Jason Evans....