Foto: "<a href="http://ccby.de/foto/an-empty-card-hanging-over-the-american-flag-on-the-background/1016914" target="_blank">An empty card hanging over the American flag on the background</a>" von <a href="http://ccby.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="http://ccby.de" target="_blank">ccby.de</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>