The United States conducted a "successful" counterterrorism operation against a "significant" Al Qaeda target Ayman Al Zawahiri in Afghanistan over the weekend, a senior administration official told Fox News. President Biden on Monday night at 7:30 p.m. E.T. is expected to address the nation from the White House on the operation. "Over the weekend, the United States conducted a counterterrorism operation against a significant Al Qaeda target in Afghanistan," the senior administration official told Fox News Monday. "The operation was successful and there were no civilian casualties." Two intelligence sources tell Fox News Al Qaeda leader Ayman Al Zawahiri was...