The incident, on a rural southern Minnesota lake, is at least the third carbon monoxide related fatality involving ice anglers in Minnesota in the past three years.
The military believes the engine suffered a "catastrophic failure," disintegrated and fell into a river, the Air Force said. No injuries were reported.
Experts tie a spike in pedestrian deaths in Minnesota to more people driving and to more distractions such as smartphones, illustrating what's been a grim upward trend across the country in recent years.
Last year sometimes felt like one natural catastrophe after another. Now, reinsurer Munich Re says there were some 750 natural disasters, suggesting it was a particularly bad year.
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Police said Wednesday that Vidal Morales Guzman was vacationing with his family along Puerto Rico's north coast when he saw his 19-year-old stepson struggling in the water.
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