Here is the latest Iowa news from The Associated Press at 3:50 a.m. CDT

DES MOINES, Iowa (AP) — Sen. Joni Ernst is asking the Defense and Justice Departments to explain how they handle student-on-student sexual assaults at K-12 schools the Pentagon runs on military bases worldwide. The Iowa Republican wrote the defense secretary and attorney general Tuesday based on issues raised in an ongoing Associated Press investigation. The AP showed how reports of student-on-student rapes or assaults often languish and that the system’s 71,000 students have fewer protections than public school kids.

JUNEAU, Alaska (AP) — The recent discovery of the USS Juneau in the depths of the South Pacific has provided some closure to people with connections to the ship that was blown apart during World War II. Hundreds died, including the five Sullivan brothers from Waterloo, Iowa. An expedition team backed by Microsoft co-founder and philanthropist Paul Allen reported finding the wreckage over the weekend. The Sullivans’ story was told in a 1944 movie.

CEDAR RAPIDS, Iowa (AP) — A 30-year old northern Iowa man convicted of sexually exploiting a child and extorting the minor has been sentenced to more than 28 years in federal prison. Prosecutors say Jason Marvets, of Eagle Grove, was sentenced Tuesday after earlier pleading guilty to one count of sexual exploitation of a child and one count of extortion.

CEDAR RAPIDS, Iowa (AP) — A Wisconsin man convicted of enticing a minor to engage in sexual activity has been sentenced to 30 years in federal prison. Federal prosecutors in Iowa say 26-year-old Carson Sibley, of Lacrosse, Wisconsin, received the prison term Monday after pleading guilty to one count of enticement of a minor. Prosecutors say Sibley twice travelled to Grundy County, Iowa, hoping to have sex with a minor.