NPR News Now covers the U.S. withdrawal of long-range bombers from a U.K. base amid a potential drone threat, and State Secretary Marco Rubio's call for Russia to share details on a suspected pneumonic plague death. The broadcast also reports that Tennessee inmate Krista Pike is awake after a failed execution, highlights the Nobel Chemistry Prize awarded to Henri Kagan and Kenzo Soai, and features a Michigan gubernatorial debate. Additionally, the segment notes the formation of Tropical Storm Isaias in the Gulf of Mexico and the death of actress Eva Marie Saint at age 102.