Sunlight, heat and humidity may have a “powerful” impact on killing the coronavirus within one or two minutes, a Department of Homeland Security official said on Thursday. Increasing temperatures, humidity and sunlight are detrimental to coronavirus saliva droplets on surfaces and in the air, Homeland Security official William Bryan reported at a White House press conference. President Trump said of the emerging results, “The whole concept of the light, the way it kills it in one minute, that’s pretty powerful.” Trump said, “We want ideas to get rid of this thing, and if heat is good and if sunlight is...