It's Monday, the 8th of May. I'm David Brancaccio.
Authorities say other arrests are possible.
According to Lloyd's of London, the worm is proof that e-commerce will emerge as the single biggest insurance risk of the 21st century. Marketplace's Rachael Myrow reports. For the average person, last week's attack may seem more of an annoyance than a disaster but that's no reason to relax, says Prudential Securities' Paul Merenbloom. And if, for example, it were to affect the banking industry, you could essentially destabilize an economy that way. But, he adds, there's also strength in numbers.