The agency that monitors daily images of the Arctic ice pack reports the ice in early September reached its minimum but did not retreat as much this year as last.  But scientists warn that in about the last decade, the world's sea ice has melted faster than expected. 

The National Snow and Ice Data Center in Boulder, Colorado, which monitors the daily updates of NASA's satellite images, says the northern winter ice now has begun to re-form. VOA's Paul Sisco spoke with NASA Ice Science Project chief scientist Jay Zwally about this year's near record summer melt.