Analysis Summary:

The article appears mostly accurate based on the available verification sources. The key claim about a plane crash in upstate New York with at least one fatality is supported. There is no apparent bias in the reporting.

Detailed Analysis:

• Claim 1:** "Plane crash kills at least 1 person in upstate New York, authorities say."
• Verification Source #1: Supports this claim, stating "A small plane crashed in upstate New York Saturday afternoon killing at least one person, officials said."
• Claim 2:** "It was unclear as of Saturday what had caused the plane that was carrying six people to crash near Copake, N.Y."
• Verification Source #1: Does not explicitly mention the cause or the number of people on board, but it does confirm the location as upstate New York.
• Verification Source #5: Mentions a plane crash in upstate New York.
• Fail to cover:* The number of people on board the plane.

Supporting Evidence/Contradictions:

• Verification Source #1: Confirms the plane crash in upstate New York with at least one fatality.
• Verification Source #5: Confirms plane crash in upstate New York.
• Lack of Coverage:* The number of people on board the plane and the cause of the crash are not confirmed by all sources.