The U.S. states need both widely available testing and contact tracing to successfully open up.
Germany and South Korea have both provided the best model for doing this.
Having an approach with full contact tracing reduces the number of tests that are necessary since you are testing a targeted population of people rather then randomly testing across the entire nation' population.
At this point, that isn't going to happen before we open. The best we can do is put smarter plans for the next go-round.