Olympic champion Athing Mu’s hopes for a repeat title came crashing down during the first lap of the 800-meter final at U.S. track trials.

Here are things to know for Wednesday, September 8:

The Mu variant has been in Houston since May, but there’s a reason you haven’t heard a lot about it, mostly because it wasn’t considered a named variant by the WHO until last week, and health leaders say the Delta variant is still the main concern.

Doctors at Houston Methodist Hospital have discovered cases of a new variant of COVID-19 among patients being treated for the virus, the hospital confirmed Monday to KPRC 2.

The 19-year-old will be hunting for her country's second gold in the event after Madeline Manning's triumph in 1968 and their first medal since 1988.