Fears of another volcanic eruption rattle Japan

Aired: 9/30/2014 | 0:04:50 | Clip
In Japan, Saturday's surprise eruption of Mt. Ontake killed at least 36 people and covered the mountain in thick smoke and piles of ash. Since then, rescue efforts have been hampered by toxic gases and fears of another eruption. Science correspondent Miles O’Brien and NASA’s Thomas Wagner join Judy Woodruff to discuss the difficulty of predicting volcanic eruptions.