Final answer:
Jack Ruby and Lyndon B. Johnson are suspects in the Kennedy assassination for their connections and potential motives.
Explanation:
Name: Jack Ruby
Reason: Jack Ruby is a suspect in the Kennedy assassination due to his connection to Lee Harvey Oswald, as he famously shot and killed Oswald just days after the assassination.
Name: Lyndon B. Johnson
Reason: Lyndon B. Johnson has been speculated as a suspect by some conspiracy theories, suggesting he could have had motives to be involved in Kennedy's assassination to become president.
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