Kremlin leader Vladimir Putin is likely to face significant challenges in reaching the Hungarian capital, Budapest, where talks with US President Donald Trump may take place, due to the risks associated with crossing European airspace.

ANKARA (Reuters) -German Foreign Minister Johann Wadephul said the planned Budapest talks between U.S. President Donald Trump and Vladimir Putin were a second attempt to make the Russian president recognise the need to negotiate seriously with Ukraine.

The outcome of their call is expected to influence the president’s discussions with his Ukrainian counterpart, Volodymyr Zelensky, on Friday over the prospects of the U.S. providing a powerful new weapon system.