Ukrainian air defense in the front-line areas is not strong enough to block the work of Russian aviation. This leads to significant losses among Ukrainian military personnel and allows the aggressor to quickly capture new territories with air support, according to a report by the Institute for the Study of War (ISW). The report cites videos from Russian military bloggers demonstrating how Russian Su-25 and Su-34 aircraft strike positions of the Ukrainian defense forces at low altitudes near the town of Chasiv Yar in the Donetsk region. According to the bloggers, Russian aviation has allowed th…