HISTORY DETECTIVES investigate a Civil War soldier’s letter, fabric from an aircraft that could be linked to Charles Lindbergh and Igor Sikorsky, and a 1950s comic book, "Negro Romance."

Why did the Civil War soldier behind this letter want to lead an African-American unit? If these are really the signatures of Charles Lindbergh and helicopter inventor Igor Sikorsky, what aircraft did this fabric come from? And, did African-American artists create this 1950s comic book, "Negro Romance"?