They’ve gone camping to stay safe at work. At a Philadelphia supermarket, the cashier’s side of each checkout line has been outfitted with a tent-like plastic enclosure, keeping essential workers safe while on the job.Alexander Tavares, 19, captured now-viral footage of the new working conditions, constructed to prevent the spread of the coronavirus, at a store on March 25. In the video, Tavares walks past the transparent plastic sheet-covered checkouts, pausing at one where