Dias Kadyrbayev was driving back to his apartment when he got a call from a college buddy.

NPR: Texts, TV, Then Trouble For Bombing Suspect's Pals

Skype works very much like an instant messaging program, but allows users to call people on their buddy list and have a voice conversation instead of a text-based chat.

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In 1995 a buddy told him to check out a six-person call center running out of an air-conditioned trailer at a minimum security prison.

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