WASHINGTON, May 29 - In the last few months, the small commercial air service to the naval base at Guantánamo Bay, Cuba, has been carrying people the military authorities had hoped would never be allowed there: American lawyers. And they have been arriving in increasing numbers, providing more than a third of about 530 remaining detainees with representation in federal court. Despite considerable obstacles and expenses, other lawyers are lining up to challenge the government's detention of people the military has called enemy combatants and possible terrorists.
