Russia and Ukraine resume US-mediated peace talks in Abu Dhabi, with territorial disputes over Donbas and Crimea among the key obstacles. Al Jazeera reports. The sides remain divided over territorial control, Ukraine’s military and NATO ambitions, and whether a ceasefire should precede a broader peace deal. Russia, Ukraine and the US are set to resume trilateral peace talks in Abu Dhabi, with security guarantees, ceasefire proposals and humanitarian efforts on the agenda.