Tesla's Electric Semi Shows Promise—But Will it Deliver?

Elon Musk finally revealed the Tesla Semi, an electric big-rig he professes will outstrip the diesel fleets that have dominated American freight for decades.The Tesla CEO flaunted his latest creation and its “BAMF performance”—it’s a technical term, he says—at an unveiling ceremony Thursday night in Hawthorne, CA. He outlined the semi’s specs, which include parlor tricks like going from 0-60 mph in 5 seconds and potentially industry-upending figures for drivin