Why did BO scuttle the shuttle program? Because he couldn't take it with him when he left office
Why does he travel before POTUS? To remind everyone that he's still the boss.
Why does he travel after POTUS? To remind everyone he's still the boss and apply appropriate pressure as needed.
Where is BO today? On his way to Japan.
The members of the Six-Party talks included United States, North Korea, China, Japan, Russia and, South Korea. The US refused bilateral talks with NK. Why? What show would there be in talking to yourself. Bring the hostages to the table.