intro to the title track from Alter Bridge's album, Fortress.
The tuning is in a variation of open D5, a half step down.  Tremonti states that 
the song was written in that tuning in an interview I watched.  

E|----------------|---------------|---------------|---------------|
B|----------------|---------------|---------------|---------------|
G|----12-----12---|---12-----12---|---12-----12---|---12-----12---|
D|--0----0-0----0-|-0----0-0----0-|-0----0-0----0-|-0----0-0----0-|
A|----------------|---------------|---------------|---------------|
E|----------------|---------------|---------------|---------------|

E|-------------------|-------------------|-------------------|
B|-------------------|-------------------|-------------------|
G|-----12------12----|-----12------12----|-----12------12----|
D|----------0------0-|----------0------0-|----------0------0-|
A|--13---13----------|--13---13----------|--12---12----------|
E|-------------------|-------------------|-------------------|

E|-------------------|
B|-------------------|
G|-----12------12----|
D|----------0------0-|
A|-------------------|
E|--10---10----------|