Besides Lincoln, who else did Booth and others plan to kill?

Conspirators Lewis Powell and David Herold were assigned to kill Secretary of State William H. Seward, and George Atzerodt was tasked with killing Vice President Andrew Johnson. Beyond Lincoln's death, the plot failed: Seward was only wounded and Johnson's would-be attacker lost his nerve.

Explanation:

each played a major role in ending the cold war.