A group interview at NASA headquarters in Washington about changes seen in the Arctic in 2012, conducted by Tom Wagner, NASA program scientist for the cryosphere.  Interviewees were Waleed Abdalati, NASA chief scientist; Thorsten Markus, head of NASA Goddard’s Cryospheric Sciences Lab and the Project Scientist for the ICESat-2 mission; and Laura Koenig, physical scientist in the Cryospheric Sciences Laboratory at NASA’s Goddard Space Flight Center. Credit: NASA