How can one obtain copies of archival Washington Post historical 'flashback' comics on Ninian Beall from 2002?

You may be able to access archives of The Washington Post from 2002, including the 'flashback' comics on Ninian Beall, by contacting The Washington Post directly or visiting their website. Another option is to check with libraries or institutions that hold collections of newspapers for that specific year. Some libraries also offer online databases that include historical newspapers.