"I am extremely disappointed by the actions of the 9/11 commission"

Curt Weldon's quote expresses his dissatisfaction with the 9/11 Commission's actions. He is most likely referring to the Commission's failure to examine certain aspects of the 9/11 attacks, such as the possibility of foreign government participation. Weldon's disappointment indicates that he thinks the Commission did refrain from doing enough to discover the fact behind the attacks. He might also be expressing his frustration with the Commission's lack of transparency and its rejection to launch certain files related to the investigation. Weldon's quote reflects his discontentment with the Commission's work and his belief that more ought to have been done to reveal the truth behind the 9/11 attacks.