Deadly aftershock, volcanic ash spread alarm in Mexico

By Michael O'Boyle and Noe TorresMEXICO CITY (Reuters) - A magnitude 6.2 aftershock that shook Mexico on Saturday was blamed for five deaths, spreading fear among anxious residents reeling from a string of natural disasters and interrupting the search for survivors from a bigger tremor earlier this week.The Popocatepetl volcano south of Mexico City sent a column of ash into the sky, capping an intense period of seismic activity including two powerful tremors this month that have killed more than