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PBS News Hour

Understanding the Bombs Used at the Boston Marathon

NewsHour science correspondent Miles O'Brien visits the nation's most active explosives testing facility in New Mexico to learn more about what makes a pressure cooker bomb -- like those used at the Boston Marathon -- tick. Investigators often use the center to test theories and find new ways to defend against future attacks.
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January 20, 2026 - PBS News Hour full episode
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Season 2026 Episode 20
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Season 2026 Episode 7
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