A UPS strike looms in a world grown reliant on everything delivered everywhere all the time. UPS shipped 24 million packages on an average day about a quarter of all U.S. parcel volume, according to pitney bowes, UPS says they deliver the equivalent of about 6% of the nation's gross domestic product. That makes major supply chain disruptions all but certain if its union strikes, the teamsters which represent about 350,000 UPS workers have said they'll walk off the job if they don't get a new contract, the current one expires July 31st. The last time UPS workers went on strike was more than two decades ago. I'm Julie Walker.