“Red-Pill Factories: A Troubling Visit to On-line Places of Radicalization,” Review, Times Literary Supplement, June 26, 2020.

“The Flood of On-Line Misinformation Around the George Floyd Protests,” Lawfare, June 22, 2020.

“My 48 Hours Alone with Radovan Karadzic,” New York Times, January 16, 2020.

“The World is Fighting More than ISIS,” New York Times, October 27, 2019.

“Trump’s Executive Order Will Make Us Less Safe,” Boston Globe, January 30, 2017

“How Terror Hardens Us,” New York Times, December 5, 2015.

“How ISIS and Other Jihadist Groups Lure Westerners,” Boston Globe, April 6, 2015.

“Iraq: Where Terrorists Go to School,” New York Times,March 19, 2013.

“The Invasion of Iraq Was an Engine of Terrorist Growth,” US News & World Report, March 19, 2013.

“The Double Standard of Sex Crimes,” Time Magazine, July 27, 2011.

“After Bin Laden,” Washington Post, May 8, 2011.

“Osama Death will Reopen America’s 9/11 Wounds,” Daily Beast, May 2, 2011.

“Arab Revolutions Don’t Mean the End for al Qaeda,” Boston Globe, April 20, 2011.

“The Military Must Take a Harder Line Against Sexual Assault,” Washington Post, February 18, 2011.

“Why Does Terrorism Fascinate Me?  Because of the Terror of my Past,” Washington Post, June 20, 2010.

“Five Myths About Who Becomes a Terrorist,” Washington Post, January 10, 2010.

“Mind Over Martyr,” International Herald Tribune, December 21, 2009.

“Keep American Muslims on Our Side,” New York Times, September 10, 2006.

“Jihad: A Global Fad,” Boston Globe, 1 August 2006.

“Al Qaeda, American Style,” New York Times 16 July 2006.

With Jeffrey Frankel, “The Wrong Approach,” Baltimore Sun, Oct 29, 2004.

“Terrorists’ Own Words Can Help Us Stop Them,” USA Today, 24 June 2004.

“Militant Groups: Beneath Bombast and Bombs, a Caldron of Humiliation,” Los Angeles Times, 8 June 2004.

“How the War in Iraq Has Damaged the War on Terrorism,”Salon, 7 April 2004.

“Que significan los atentados del 11-M para Espana y el mundo?”  El Pais, 27 March 2004.

“Errors in Fighting Al Qaeda Have Worsened the Danger,” Boston Globe, March 25, 2004.

“Explaining the Addiction to Jihad,” The Daily Star(Lebanon), February 5, 2004.

“When Women are Bombers,” Washington Post18 December 2003.

“Terrorism’s New Mecca,” Globe and Mail, 28November 2003.

“How America Created a Terrorist Haven,” New York Times, 20 August 2003.

“A Rational Response to Dirty Bombs,” Financial Times, 12 June 2002.

“Allies Split over Executing Terrorists,” Boston Globe, 28 May 2002.

“Get to the Roots of Terror: Trauma and Humiliation,” International Herald Tribune, 26 April 2002.

“How Terrorists Hijacked Islam,” USA Today, September 30, 2001.

“Being Feared Is Not Enough to Keep Us Safe,” Washington Post, September 15, 2001.

“Execute Terrorists at Our Own Risk,” New York Times, February 28, 2001.

“A Lethal Weapon We Must Learn to Recognize,” New York Times, October 16, 1999.

“Taking the Terror Out of Bioterrorism,” New York Times, April 8, 1998.

“U.S. Backs Wrong Nuke-Deterrence Efforts,” USA Today, September 17, 1997.

“Preventive Defense,” Washington Post, June 23, 1997.

“Ratify the Chemical Weapons Treaty,” Los Angeles Times, February 24, 1997.

“Terrorism Multiplied,” Washington Post, July 17, 1996.

“Preventing Portable Nukes,” New York Times, April 10, 1996.