"The New York Review of Books" illustrated a recent piece on US might with a drawing of George Bush togged up as a Roman centurion, complete with shield and spears. Bush's visits to Germany in 2002 and 2006 resulted in further Bush-as-Roman-emperor invective appearing in the German press. In 2006, freelance writer, political satirist, and correspondent for the left-leaning "Die Tageszeitung", Arno Frank, compared the spectacle of the visit by "Imperator" Bush to "elaborate inspection tours of Roman emperors in important but not completely pacified provinces—such as Germania". In September 2002, Boston's WBUR-FM radio station titled a special on US imperial power with the tag "Pax Americana". "The Roman parallel, wrote Niall Ferguson in 2005, is in danger of becoming something of a cliché." Policy analyst Vaclav Smil titled his 2010 book by what he intended to explain: "Why America Is Not a New Rome". The very phenomenon of the Roman-American association became the subject of research for Classicist Paul J. Burton.