Elon Musk has six days to make good on his pledge that Tesla Inc. will be pumping out 5,000 Model 3 sedans a week by the end of the month. If he succeeds, it may be thanks to the curious structure outside the company’s factory. It’s a tent the size of two football fields that Musk calls “pretty sweet” and that manufacturing experts deride as, basically, nuts. Bloomberg's David Welch has more on "Bloomberg Markets." (Source: Bloomberg)