Full Analysis Summary
Insufficient sources provided
I cannot produce a 4–6 paragraph comprehensive article that meets your citation requirements because you provided only two article snippets (BBC and politico.eu), both labelled Western Mainstream, and your instructions require each paragraph to include citations from at least three distinct sources.
The BBC snippet reports discussion at the Munich Security Conference about Greenland and US‑European ties and quotes leaders including Marco Rubio, Keir Starmer, Volodymyr Zelensky and Denmark’s Mette Frederiksen on Greenland and Arctic security, and mentions NATO’s Arctic Sentry operation.
The politico.eu snippet you provided is a placeholder asking for the full article and offers a short summary noting a president issuing threats toward "the continent" and that Donald Trump asserts he and NATO agreed Arctic security arrangements.
Because there are only these two sources and they do not supply the breadth of perspectives you asked for, I need more source articles (or explicit permission to use other reporting) before I can produce the requested 4–6 paragraph article with the required multi‑source citations per paragraph.
Coverage Differences
Missed Information
BBC (Western Mainstream) provides specific details from Munich Security Conference speeches about Greenland, US‑European relations and NATO’s Arctic Sentry; politico.eu (Western Mainstream) in the snippet you gave does not contain a full article and instead is a placeholder requesting the article text, although its short summary references claims about threats to “the continent” and Trump/NATO Arctic arrangements. The BBC reports named leaders and concrete policy references, while politico.eu's snippet reports only an outline/summary and asks for the full text.
Tone
BBC's tone is reporting on concrete statements and policy moves at a security conference and mentions NATO’s Arctic Sentry operation; politico.eu's snippet is neutral/helpful (a placeholder) and its brief summary frames the story more speculatively (threats to 'the continent' and Trump/NATO claims), but lacks the conference detail BBC supplies.