Petro Nikitin, left, takes part a surgery operation of Ukrainian serviceman at the military hospital in Kyiv, Ukraine, on Thursday, May 5, 2023. As the lead trauma surgeon at a military hospital in the Ukrainian capital, he's been confronted with the realities of the bloody conflict since day one of the Russian invasion some 14 months ago. While the Ukrainian military does not provide casualty figures, some Western sources estimate more than 100,000 Ukrainian troops have been killed and wounded since Russia invaded the country. (AP Photo/Alex Babenko)