What specific ideas does the author introduce to tie the events of september 11th to the specific study pf complex systems?

hancock was president of congress when the declaration of independence was adopted and signed. he is primarily remembered by americans for his large, flamboyant signature on the declaration, so much so that "john hancock" became, in the united states, an informal synonym for signature.

explanation:

you should probally put the sentences that you can choose from if you want me to you get 100%