I love how we're expected to suspend disbelief to consider that this would have to play out in total secrecy. As I'm sure your considerable research into this has revealed the scope of such a mission. Months if not years of planning. Ripping apart walls to remove material and place charges. Miles upon miles of det cord and the intentional damaging of support structure.
In two buildings.
At night, so as not to arouse the suspicion of over 50,000 workers and round the clock security.
All while being able to avoid routine patrols by animals specifically trained to detect explosives