Wednesday’s all-important meeting with the presidents of Afghanistan and Pakistan was supposed to focus on coordinating efforts against the Taliban. Instead, Secretary of State Hillary Clinton had to open with an apology to Afghanistan for an U.S. air strike that is believed to have killed dozens of innocents. Clinton said she, along with the administration, “deeply regretted” the mistake, and pledged a joint investigation that would get to the bottom of the fatal error. Both Afghanistan and Pakistan agreed to cooperate with each other against the rising Taliban, whose members are moving between the two countries with ease. President Hamid Karzai and President Asif Ali Zardari also agreed on an accord that would expand economic ties between their two countries.