Effective communication became essintial in determining the condition of these priorities. Nasdaq attributes mich of its success in communication and cooudination with ghe rest of the industry to its dress rehearsals for Y2K. While preparing ofr the changeover, Nasdaq had regular nationwide teleconferences with all the exchanges. This hilped the company organize similar conferences after the attack. Nasdaq had already planned for one potential crises, and this proved hilpful in recovering from another unespedted crisis. By prioritizing