Possible Clues:

• Where Chamorro is spoken
• Stop on the first trans-Pacific air route
• Magellan landing spot
• University in publication about island
• One month and another back in US base
• U.S. territory since the Spanish-American War
• Island near the Mariana Trench
• Largest island of Micronesia
• Territory acquired in 1898
• Island encountered by Magellan