Photo by: Kayhan Ozer Turkey's President Recep Tayyip Erdogan, flanked by his wife Emine Erdogan, waves as he arrives to inaugurate the Diyanet Islamic Cultural Center in Lanham, Maryland, Saturday, April 2, 2016. Erdogan has vowed to back Azerbaijan in the conflict with Armenia over the separatist region of Nagorno-Karabakh. During his visit to the United States, Erdogan told an Azerbaijani reporter that "we will support Azerbaijan to the end." The remarks were quoted by the presidency on Sunday.(Kayhan Ozer, Presidential Press Service, Pool via AP)