Conversation so far:
How long did Rogers Morton' congressional career last?
Rogers Morton served in Congress from 1963 until 1971.
What did Rogers Morton do in congress?
In Congress, Rogers Morton worked to enact legislation that would preserve the Chesapeake Bay, including laws reducing pollution into the Bay.
What are some things he did while in Congress?
Rogers Morton also worked for the creation of a national park on Assateague Island.
What was something else he did while in Congress?
Rogers Morton also provided funds to the Army Corps of Engineers to model how the Chesapeake Bay functions as an estuary.
What did he serve in Congress?
Rogers Morton was a Member of the U.S. House of Representatives from Maryland's 1st district.
Are there any other interesting aspects about Rogers Morton?
Rogers Morton was related to George Rogers Clark, a military officer who served during the American Revolutionary War.

Question: When did his career end?
Self-contained rewrite: When did Rogers Morton' career end?