Continental Airlines moved its employees into the Cullen Center , including Continental Center I and Continental Center II , in stages beginning in July 1998 and ending in January 1999 . After the September 11 attacks and by September 2004 , Continental laid off 24 % of its clerical and management workers . Despite the reduction of the workforce , Continental did not announce any plans to sublease any of its space in Continental Center I and Continental Center II . As of 2008 the airline leases at Continental Center II . As of that year it has not yet renewed its lease
September 11 attacks
September 11 attacks
Cullen Center