You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did it become illegal to kill bald eagles?" whose answer is 1940.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did it become illegal to kill bald eagles
Useful Output:

Doc 1: The bald eagle — the U.S. national symbol — was removed from protection under the Endangered Species Act in 2007, following a dramatic recovery
Doc 2: The passage of the Bald Eagle Protection Act of 1940 prohibited the killing or selling of bald eagles. The act also increased public awareness
Doc 3: After being reclassified from “endangered” to “threatened” in 1985, the bald eagle's de-listing in 2007 represented a major victory for wildlife
Doc 4: This law, originally passed in 1940, provides for the protection of the bald eagle and the golden eagle (as amended in 1962) by prohibiting the
Doc 5: In 1962, the Act amended to incorporate golden eagles, becoming the Bald and Golden Eagle Protection Act (BGEPA). This Act prevented the killing