NASA May 12, 2018 3:38 pm NASA Shows Off Mars Helicopter In an interstellar first, NASA plans to send a helicopter to Mars. US & World Videos 2:12 Flowers missing from memorial for fallen Marine in Lynn 1:02 20% of nurses to leave field within 2 years 1:05 Marking construction safety week in Boston 20:19 Karen Read's attorney accuses witness of perjury at murder trial 5:31 Inside the takedown of Mass. catalytic converter theft ring