"The leaseholder of the World Trade Center properties is asking a U.S. federal judge to reject arguments that American Airlines is not liable for damages stemming from the September 11, 2001 hijackings because the attacks were an act of war.

Larry Silverstein filed court papers Wednesday asking U.S. District Judge Alvin Hellerstein in Manhattan to dismiss that line of defense by the airline and its parent, AMR Corp, in the developer's long-running negligence lawsuit against them.

Silverstein has sought to hold American and United Airlines, now United Continental Holdings Inc, responsible for damages from the 2001 attacks for allegedly failing to provide adequate airport and airline security".

http://www.reuters.com/article/2013/02/20/us-usa-worldtradecenter-airlines-idUSBRE91J13O20130220?irpc=932