European leaders will meet for an extraordinary summit on March 6 to discuss more support for Ukraine and ways to boost European defence. European Council President Antonio Costa called it a "defining moment" for Ukraine and European security. Meanwhile, Russia and the United States are set for another round of high-level talks this week, a possible thaw in relations that hit Cold War-era lows during the Ukraine war. U.S. President Donald Trump and Russian President Vladimir Putin spoke earlier this month, with Trump eager to broker a peace deal, calling Ukraine's NATO ambitions impractical. British Businessman Sir Martin Sorrell in an exclusive conversation with NDTV's Gaurie Dwivedi on Russia-Ukraine war, and the way forward.