Emirati Foreign Minister Abdullah bin Zayed Al Nahyan (L) waits as U.S. Secretary of State John Kerry (R) and a member of diplomatic security tie their shoelaces after touring the Sheikh Zayed Grand Mosque in Abu Dhabi, United Arab Emirates

U.S. Secretary of State John Kerry (C) tours the Sheikh Zayed Grand Mosque with Emirati Foreign Minister Abdullah bin Zayed Al Nahyan (2nd L), Yousif Abdullah Al Obaidi, the mosque's general manager (3rd L), and Hajar Alali, the mosque's cultural guide, in Abu Dhabi, United Arab Emirates

U.S. Secretary of State John Kerry (C) tours the Sheikh Zayed Grand Mosque with Hajar Alali, the mosque's cultural guide, in Abu Dhabi, United Arab Emirates

U.S. Secretary of State John Kerry (C) walks through Sheikh Zayed Grand Mosque as he takes a tour of the mosque in Abu Dhabi, United Arab Emirates