In some countries and at some points in history, what news media and the public have considered 'newsworthy' has met different definitions, such as the notion of news values. For example, mid-twentieth-century news reporting in the United States focused on political and local issues with important socio-economic impacts, such as the landing of a living person on the moon or the cold war. More recently, the focus similarly remains on political and local issues; however, the news mass media now comes under criticism for over-emphasis on 'non-news' and 'gossip' such as celebrities' personal social issues, local issues of little merit, as well as biased sensationalism of political topics such as terrorism and the economy. The dominance of celebrity and social news, the blurring of the boundary between news and reality shows and other popular culture, and the advent of citizen journalism may suggest that the nature of 'news' and news values are evolving and that traditional models of the news process are now only partially relevant. Newsworthiness does not only depend on the topic, but also the presentation of the topic and the selection of information from that topic..