During the period commencing on the Termination Date and ending on the fourth anniversary thereof, Executive shall use reasonable efforts to make himself available as a witness in any action, investigation or other proceeding before any court, government agency, arbitrator, or mediator, in which he may be called to appear by the Company, regarding any business, property, or operations of the Company or any of its affiliates, parents or subsidiaries, and shall truthfully testify in any such action, proceeding or deposition in which he also appears. Upon request by Executive and prior approval by the Company, the Company shall reimburse Executive for reasonable travel expenses incurred by Executive in connection with any such appearance in which Executive is so called to appear.