Illinois man drowns in Alaska mud flats during tide.

A 20-year-old man from Illinois drowned in the mud flats of Turnagain Arm, Alaska, after getting stuck up to his waist in the quicksand-like silt and being submerged by the incoming tide. The area is known for its dangerous mud flats made of silt created by glacier-pulverized rocks, and at least three other people have drowned there over the years. Many more have been rescued, including someone who was fishing there last month. Authorities urge people to call 911 as soon as possible if they think there might be an issue.