[citation needed] In 1991, he wrote "The Thriving Cult of Greed and Power", a Time cover story on Scientology.

[6] A 2003 report by Behar in Fortune explored Donald Rumsfeld's role in helping North Korea build its potential Nuclear weapon capacity, in an article entitled "Rummy’s North Korea Connection: What Did Donald Rumsfeld Know About ABB’s Deal to Build Nuclear Reactors There?

[9] Reporting from Pakistan for Fortune magazine and CNN after 9-11, Behar’s “The Karachi Connection” broke ground by exposing a logistics leader of the 9-11 attacks—including his secret travels near the Afghanistan border just days before the terror attacks.

Behar and Time Inc. were sued for libel in June 2001 by the billionaire brothers David and Simon Reuben, who built one of the world's largest aluminum companies, Trans-World Group.

[10][11] In October 2004, Behar left Fortune to pursue book writing and various independent projects, including the launch of Project Klebnikov, a global media alliance investigating the July 2004, murder of Paul Klebnikov, who was then the editor-in-chief of Forbes Russia.

Behar also served on the advisory committee of New York University's business journalism Master's program (BER), and has long been reporting and writing Madoff: The Final Word, a book about Bernard Madoff, published by Simon & Schuster.

[2] In 2015, Behar co-wrote an article for the New York Observer that accused the Associated Press of improperly reporting civilian deaths in the 2015 Israel-Hamas war in Gaza.