Tonight on Nightly Business Report, stocks fall and take a leg lower midday around the time reports surfaced of a mass shooting in Southern California. And, oil prices fall below the key level of $40 a barrel for the first time since August.
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Top Stories from CNBC- Tesla sues former employee for allegedly stealing software code
- Former ambassador warns expiration of key nuclear treaty with Russia would make the U.S. 'worse off'
- 'A Quiet Place II' delayed again, sets sights on September release
- Tesla engineering director Joseph Mardall leaves for drone start-up Zipline
- Biden says nothing can change the trajectory of the Covid pandemic over the next several months
