U.S. Sen. Tim Kaine, D-Va., is demanding answers from the U.S. Postal Service over late delivery of hundreds of cancer screening results from military veterans to the Richmond Veterans Affairs Medical Center, which is part of the Central Virginia VA Health Care System.

Kaine called on the Postal Service to explain why the results of 870 immunochemical screenings for colon cancer arrived late to the VA Medical Center, including an estimated 450 results for tests dating as far back as mid-summer that are no longer usable.

Read the full story in the Richmond Times-Dispatch.