WSJ investigation into pagers that exploded in the hands of Hezbollah militants reveals an international network of firms involved.

An Israeli attack on Hezbollah led to the collapse of its network. Investigations revealed an interconnected network of companies and individuals in Asia and Eastern Europe involved in the production, distribution and sale of pagers. The operation has raised questions about the complexity of today's information warfare, in which governments and militant groups compete with each other through covert methods.