If you hear the acoustic version you will hear this descending riff he plays.  
While playing the Dm it sounds like he grabs the low F and open 
Low E string at the end of each bar.  He does this between verses as well.  
There are a few different ways to get a good sound for this. 

Verse: 

Dm                                             F             Dm  
You can a look a hurricane right in the eye  
Dm                                  F       Dm  
1200 people dead or left to die  
Dm                                                 Bb              Dm  
Follow the leaders, we're in an eye for an eye we'll all be blind  
Dm                                                 Bb                Dm        A  
Death for murder and this I'm sure in this uncertain time  
  
Dm                                                    F  
So come pull the sheet over my eyes  
       	                 Bb  
So I can sleep tonight  
Dm                         C  
Despite what I've seen today  
Dm                               F                                      Bb  
I find you guilty of a crime, of sleeping at a time  
Dm                                           C       
When you should have been wide awake  

  
  
Verse:  

Dm                                        F                Dm  
Down on the road the world is floating by  
Dm                                           F         Dm  
The poor and undefended left behind  
Dm                                                                  Bb  
While you're somewhere trading lives for oil  
Dm                                           A  
As if the whole world were blind  
  
Dm                                                    F  
So come pull the sheet over my eyes  
       	                 Bb  
So I can sleep tonight  
Dm                         C  
Despite what I've seen today  
Dm                               F                                      Bb  
I find you guilty of a crime, of sleeping at a time  
Dm                                            C       
When you should have been wide awake  

  
Bridge: 

Bb         A           Dm               Bdim 
I find you guilty of a crime of this I know 

Dm                                                    F  
So come pull the sheet over my eyes  
       	                 Bb  
So I can sleep tonight  
Dm                         C  
Despite what I've seen today  
Dm                               F                                      Bb  
I find you guilty of a crime, of sleeping at a time  
Dm                                            C       
When you should have been wide awake 
Dm                   C                  Bb                 C                            Dm  
Wide awake! Wide awake! Wide awake! Wide awake!