https://www.cnet.com/news/nasa-will-totally-warn-us-if-an-asteroid-apocalypse-is-coming/

Thaller's answer boils down to something along the lines of, "Of course we would, silly." 

Here's Thaller's joking sign of the apocalypse: "The day you have all the scientists buy up all the great wine and max out their credit cards and disappear then you might want to worry." But she assures us, "If we knew something dangerous was coming there would be no way for us to hide it."