WASHINGTON - The Pentagon is planning a new offensive in the 2-year-old Afghanistan campaign to stop remnants of the Taliban regime and the al-Qaida terror network, officials said Wednesday, even as a second suicide assault on foreign troops in Kabul in as many days killed one British soldier and injured four. The attack on international peacekeepers in Kabul, the Afghan capital, drew new attention to a worsening security situation in a country where American and other Western troops have been stationed since the fall of the Taliban's leadership in early 2002. Rebels' use of roadside explosives and car bombs...