The 'humiliating' retreat of Russia's fleet from Crimea proves its threats don't mean anything, expert says

• Russia has pulled its last Black Sea Fleet warship from Crimea, per a Ukrainian navy spokesperson.
• The retreat exposes the emptiness of Russia's red lines and nuclear threats, a Ukraine expert said.
• Peter Dickinson said it shows that when confronted with opposition, Putin will likely back down.

The Russian Black Sea Fleet's "humiliating" retreat from Crimea has exposed the emptiness of the country's red lines, according to a military observer.