Columbia subject headings:
Harvard subject headings:
Afghanistan--Politics and government--2001-
Egypt--Politics and government--21st century.
IS (Organization)
Merkel, Angela, 1954-
Nationalism--Middle East
Nuclear arms control--Iran.
Obama, Barack
Syria--History--Civil War, 2011-
Terrorism--Middle East
Princeton subject headings:
Afghanistan--Politics and government--2001-
Egypt--Politics and government--21st century.
IS (Organization)
Merkel, Angela, 1954-
Nationalism--Middle East.
Nuclear arms control--Iran.
Obama, Barack.
Syria--History--Civil War, 2011-
Terrorism--Middle East.