Coronavirus death toll surpasses 18,000 in U.S.; Despite progress, not the time to be pulling back "at all"; Prominent coronavirus model now says today peak day for new deaths; NYT: New models show cases spike if stay-at-home orders lifted after 30 days; Trump: May shut down country again if cases spike upon reopening; More coronavirus cases in New York than any country in the world; Dr. Birx: Encouraging signs but we haven't reached the peak; Dr. Fauci: antibody tests coming "In a week or so"; Florida Gov appears to correct false claim that there had been no fatalities nationwide under the age of 25; NY preparing for mass burials; President Trump's Wall Street friends press him to reopen U.S. economy; Cuomo: Large-scale testing will be "The key to reopening" economy; Cuomo: Private firms can't meet testing goals, need federal help; Task Force: Philadelphia, DC, Baltimore mayors changing the curves in their cities; Philadelphia mayor: People should not get complacent; Dr. Gupta answers your questions about the virusTo learn more about how CNN protects listener privacy, visit cnn.com/privacy