Well..as far as i learned from my knowledge the answer would be in the past, the military and the FBI have prevented a number of terrorist attacks. 
Secondly, wasn't there suppose to be an option answers for your question ?
        
             
        
        
        
Answer:
Media has given political parties the tools to reach large numbers of people and can inform them on key issues ranging from policies to elections. In theory, media should be seen as an enabler for democracy, having better-educated voters would lead to a more legitimate government.
Explanation:
 
        
             
        
        
        
All three of the answers are correct.
Good luck, everyone! :)
 
        
                    
             
        
        
        
Answer:
Justinian I
Explanation:
Undertaking a massive overhaul of construction projects during his 40-year rule, Justinian is likely best known for commissioning what would be the final iteration of the Hagia Sophia among a litany of other churches and structures adding to the fame of the Byzantine empire, as well as being a great patron for Byzantine cultural art in the form of mosaics. He was also responsible for historic military campaigns to reclaim lands previously lost to Germanic invaders, meeting with success as far as Italy and re-establishing Ravenna as a capital. 
 
        
             
        
        
        
Answer: idk a lot about that topic so sorry if im wrong but i'll try to help
Explanation:
1.) The witnesses feel overwhelmed and joy. Now that this border is finally down and they are free and can cross. 2.) i think "a world has come undone before our eyes" means that , the citizens were so used to the border , with the wall being up and no one was allowed through. & after the fall, they finally had this sort of new freedom