"I like to learn about something before I talk," Mattis adds. #LondonBridge— Dan Lamothe (@DanLamothe)
href="https://twitter.com/DanLamothe/status/871192169389989888">June 4, 2017
"I like to learn about something before I talk," Mattis adds. #LondonBridge— Dan Lamothe (@DanLamothe)