Washington Post on the Boston bombs

A short article. Last sentence is below the link.

The devices’ design was immediately recognized by counterterrorism experts as a type touted by al-Qaeda for use by its operatives around the world. Similar devices have been used by terrorists in mass-casualty bombings in numerous countries, from the Middle East to South Asia to North Africa.

Yet the bomb’s simplicity and garden-variety ingredients complicate the task of determining whether the maker was an international terrorist, a homegrown extremist or a local citizen with a grudge, investigators and experts say.

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“The presence of a pressure cooker in an unusual location, such as a building lobby or busy street corner should be treated as suspicious,” warned a Homeland Security brochure issued in 2010.

Ya think?