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With Trevor Milton having stepped down as executive chairman of Nikola Motor Co. Sept. 21, the spotlight now falls to new chairman of the board Steve Girsky.

Technology shares pushed U.S. stocks to a six-week low as investors searched for new catalysts to give direction to global markets. The dollar strengthened and Treasuries were little changed.

Amazon .com Inc.’s self-driving-car unit, Zoox Inc., is getting a green light from California to test autonomous vehicles on public roads without a safety driver, becoming the fourth company to receive the state’s blessing for truly driverless testing.

Volvo Trucks North America announced Dependable Highway Express received two Volvo VNR Electric trucks, the first battery-electric Class 8 trucks to join DHE’s fleet.

Clean Energy Fuels Corp. announced that Estes Express Lines will add to its fleet 50 new trucks fueled with its Redeem brand of renewable natural gas, bringing its total to 71.

Digital freight broker Convoy launched Convoy Guaranteed Primary, a pricing program designed to procure capacity and lower shippers’ costs.

Tractor giant Deere & Co. plans to expand in Australia and New Zealand, with its one-time chief economist leading the charge.

Bulldozers and other construction equipment have been at work for weeks at the location of Tesla’s future $1.1 billion electric vehicle factory in southeast Travis County, but a site plan filed by the company is providing the first public indication of the facility’s huge eventual footprint.