Classical unified field theories describe the properties of the electromagnetic field as a purely geometric phenomenon. Einstein tried to form a generalized theory of gravitation that would unify the gravitational and electromagnetic forces (and perhaps others), guided by a belief in a single origin for the entire set of physical laws. These attempts initially concentrated on additional geometric notions such as vierbeins and "distant parallelism", but eventually centered around treating both the metric tensor and the affine connection as fundamental fields. (Because they are not independent, the metric-affine theory was somewhat complicated.) In general relativity, these fields are symmetric (in the matrix sense), but
Operation Unified Resolve Peshawar. Anti-coalition forces, led by former Afghan prime minister Gulbuddin Hekmatyar, have attacked coalition forces with their usual retinue of rockets, mines, and bobby traps. Hekmatyar has been organizing alliances between the remaining anti-coalition forces in the area and increasing their coordination. In addition to hunting the Taliban and al-Qaeda fighters, Operation Unified Resolve also distributes humanitarian assistance to the Afghan people in the nearby valleys. Operation Unified Resolve Operation Unified Resolve is an air and ground operation to flush out and trap al-Qaeda fighters hiding in the eastern Afghanistan provinces. Launched on 23 June 2003, Operation Unified Resolve is