Since he rose to power over a decade ago, Russian President Putin has striven to reassert Russia as a great power.  His recent initiative on Syria has put it back on center stage, at least in the Middle East.  But Russia's slowing economic growth and a range of foreign policy challenges raise questions about its future as a great power.  What does Putin's Russia need to do domestically and abroad to fulfill its great-power ambitions?  And can it succeed?