The United States and allies will heap pressure on Russia Tuesday to end the Ukraine war, pinning painfully high global food and fuel prices squarely at Vladimir Putin's door during a G20 summit.Leaders from the world's 20 largest economies will gather in Bali, Indonesia to discuss soaring inflation that has driven millions more into poverty and tipped several nations toward recession.On the eve of the talks, Putin's critics forged a united front, blaming his eight-month-old war for the global economic tumult.