December 28, 2005 Defense Lawyers Plan Challenges Over Spy Efforts By ERIC LICHTBLAU and JAMES RISEN WASHINGTON, Dec. 27 - Defense lawyers in some of the country's biggest terrorism cases say they plan to bring legal challenges to determine whether the National Security Agency used illegal wiretaps against several dozen Muslim men tied to Al Qaeda.The lawyers said in interviews that they wanted to learn whether the men were monitored by the agency and, if so, whether the government withheld critical information or misled judges and defense lawyers about how and why the men were singled out. The expected...