History. -- Political aspects -- 20th century. -- 1 21st century. -- 1 Atomare Ru?stung 1 Atomic bomb -- 1 Diplomatic relations 1 more ... Executive power -- 1 Foreign relations -- 1 History -- 1 Kernwaffe 1 Natinal security -- 1 National security -- 1 Nuclear energy -- 1 Nuclear nonproliferation -- 1 Nuclear weapons 1 Nuclear weapons -- 1 Political aspects 1 less ...