Operation Ice Bridge: NASA's airborne mission to monitor global warming

When, NASA's satellite for monitoring climate change from space--ICESat-1--ceased operations in February 2010, the agency drew up a new plan: Operation Ice Bridge. The mission is to use NASA DC-8 aircraft equipped with scientific instrumentation to measure the solar ice caps. Steve Hipskind, division chief of NASA's Earth Sciences Division, talks about the strategy and how scientists are studying global warming from the air--until the ICESat-2 is ready to go in 2015.