Week in pictures

7 days in 15 photos

<p>The Tungurahua volcano spews a column of ash as seen from Ambato, Ecuador, Friday, April 4, 2014. The volcano spewed a 6-mile (10-kilometer) column of ash after a powerful five-minute explosion that shot pyroclastic material onto its northern and northwestern flanks. (AP Photo)</p>

The Tungurahua volcano spews a column of ash as seen from Ambato, Ecuador, Friday, April 4, 2014. The volcano spewed a 6-mile (10-kilometer) column of ash after a powerful five-minute explosion that shot pyroclastic material onto its northern and northwestern flanks. (AP Photo)

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