https://www.reuters.com/article/us-tesla-truck/tesla-to-unveil-electric-big-rig-truck-in-midst-of-model-3-factory-hell-idUSKBN1DG1LW >Tesla Inc on Thursday will unveil a prototype electric big-rig truck, which may be able to drive itself, throwing the company into a new market even as it struggles to roll out an affordable sedan which is central to the company's future.