How zoo animals survive a blizzard

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The heads of two Northeast zoos explain how they keep their animals safe during extreme weather conditions.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=SwZDtyPE4yw:nKrvNd7s6UM:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=SwZDtyPE4yw:nKrvNd7s6UM:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=SwZDtyPE4yw:nKrvNd7s6UM:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=SwZDtyPE4yw:nKrvNd7s6UM:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=SwZDtyPE4yw:nKrvNd7s6UM:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=SwZDtyPE4yw:nKrvNd7s6UM:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=SwZDtyPE4yw:nKrvNd7s6UM:gIN9vFwOqvQ)
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