SHARECOMMENTMORE

FORT MEADE, Md. (AP) - Prosecutors are asking an expert on militant Islam to help them show that Pfc. Bradley Manning damaged U.S. interests by disclosing classified information through WikiLeaks.

Navy Cmdr. Youssef Aboul-Enein is set to testify Thursday at Manning's sentencing hearing at Fort Meade, near Baltimore.

The witness is the author the book, "Militant Islamic Idealogy." He's also a top adviser at the Pentagon's Joint Intelligence Task Force for Combating Terrorism. He argues that winning the war against militant Islamists requires a nuanced understanding of their ideology.

Prosecutors are nearing the end of their part of the sentencing hearing. Manning faces up to 90 years in prison for giving more than 700,000 documents, along with some battlefield video, to the anti-secrecy group while working as an intelligence analyst in Iraq in 2010.