Here’s a look at the top stories making headlines on the “CBS Evening News with Norah O’Donnell.” Source

The virus was first found in the federal prison system on Wednesday when two Bureau of Prison staff members tested positive for COVID-19. Source

Fitness studios are offering quarantine-friendly at-home workouts for free during the pandemic. Source

Some 200 workers and patients were tested for virus in Milwaukee. So far, no new cases have appeared. Source

25 states have yet to hold their nominating contests, as state and party officials are grappling with how best to address the primary process amid health concerns. Source

Nearly a third of American adults said their emotional well being had become worse due to coronavirus. There are ways to get help. Source

Some supermarket chains are making sure older and at-risk Americans can both get the food they need and avoid crowds during the coronavirus outbreak. Source

The lawsuit seeks to expand access to voting for those who are worried about their health but still want to be able to vote. Source

Only “mission-essential” personnel are allowed to work at NASA field centers — everyone else must work from home. Source

Americans are rushing to buy drugs and other items as they adjust to live during the pandemic. Source