Avoiding Mergers

This photograph avoids mergers that would distract the viewer from focusing on the main object.

Edit:
In this photo, the smoke, fire and building are the main object, and there's no markers that could distract the eye from focusing on the main object.

Framing

The two buildings are framing the disaster created by 9-11


Edit:
In this photo, the buildings on either side frame the leftovers of the chaos that took place, and the one person standing in the middle of everything, making the viewer focus on the chaos.

Balance

This shows that the guy is being carried by a bunch of fire fighters which makes the photograph look balanced.


Edit:
In this photo, the firefighters carrying this guy, surrounding him, make the eye see that they balance each other out by being around him in a oval shape.

Lines

The lines help the view focus on the smoke that's sliding through the frame.

Edit:
In this photo, the lines of the building going down make the viewer's eye focus on the smoke flowing across the building. 

The Rule of Thirds

This shows the twin towers on fire as the center of attention.

Edit:
In this photo, the smoke and fire of the two buildings are on the center of each of the four lines of the Rule of thirds.