As fighting intensifies in Afghanistan, US President Barack Obama is meeting members of Congress to help define future strategy in the conflict.Insurgent violence has already reached its highest level since the Taliban was ousted from power in late 2001. Two foreign troops were wounded today in a bomb blast against a coalition convoy in Wardak province, west of Kabul. And the British Defency Ministry announced that a soldier from the UK has been killed on a foot patrol in southern Helmand province. NATO forces said today that they had killed more than 100 fighters in a fierce battle in eastern Afghanistan at the weekend in which eight Americans died. It was the deadliest firefight for US troops in more than a year.