For millions of Lebanese, this week's mass explosion of pagers and walkie-talkies, with its bloody aftermath, is painfully similar to the horrific explosion four years ago of haphazardly stored ammonium nitrates that tore through Beirut's port,

The Lebanese army carried out controlled detonations after pager and hand-held radio devices exploded across the country over two days, killing at least 37 people and injuring nearly 3,000, according to the Health Ministry.