Poisonous Minds

The recent haul of suspected terrorists in several Southeast Asian countries shows that authorities region-wide are getting serious about combating terror. But the arrests also indicate that extremists are adopting new tactics for causing fresh havocperhaps in response to the pressure being put on them. On June 13 a Thai national was busted in Bangkok not with conventional explosives but with a potential dirty-bomb ingredient, cesium 137. This followed a seizure in Bangladesh on May 30 of a stash of radioactive uranium. Now, an unheralded arrest reveals that terrorists may be experimenting with...