Dr. Deborah Birx said despite signs of progress in New York and elsewhere, the United States hasn't reached the peak of the pandemic yet. Rigorous testing and contact tracing specifically are being called for, but Birx said the White House Task Force is being realistic about "how strategically that very valuable resource can be used" in the U.S.Despite empty grocery store shelves, there's an excess of food other places, like farms. NPR's Dan Charles reports on the struggling supply chain.Chaplain Rocky Walker's full conversation with Morning Edition host David Greene. Find and support your local public radio stationSign up for 'The New Normal' newsletterThis episode was recorded and published as part of this podcast's former 'Coronavirus Daily' format.