Ukrainian leader steps up diplomatic push, while his Russian counterpart will skip a summit due to ICC arrest warrant.

Ukraine President Zelenskyy and U.S. President Trump to meet at NATO summit to discuss defense and sanctions.

Ukrainian leader steps up diplomatic push, while his Russian counterpart will skip a summit due to ICC arrest warrant.

The Russian leader, who is accused of the war crime of deporting hundreds of children from Ukraine, will take part via video link instead.