Wearing a T-shirt and shorts, he left his wallet, cell phone and identification at home.

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Authorities are also seeking people thought to have provided cell members with logistical support and identification, he said.

CNN: Iraq: Arrests made in ministry truck bombings

Another goal: to make Songdo the largest so-called ubiquitous city, where wireless networks and radio-frequency identification will link all information systems--every laptop, stoplight, cell phone, TV and toaster.

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