Summary and Key Points: Russia has lost an estimated 250 to 400 aircraft over Ukraine, including Su-25 attack jets, Su-34 strike fighters, and — most painfully — Tu-95 and Tu-22 strategic bombers it can no longer build.

It is the highest on-the-record estimate of Russian military deaths to come from any government since the war in Ukraine began.

In a significant escalation early on Sunday, May 24, Russia conducted one of its most intense bombings of Ukraine since the conflict began, resulting in at least four fatalities and numerous injuries.

The transfer would further expand Ukraine's fleet of Western-supplied fighter aircraft, which already includes American F-16s and French Mirage 2000s but remains insufficient to fully defend

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By Simon Johnson and Johan Ahlander UPPSALA, Sweden, May 28 (Reuters) - Ukraine will buy 20 new Gripen fighter jets and Sweden will donate 16 of an older model next year, Ukraine's President Volodymyr Zelenskiy and Sweden's Prime Minister Ulf Kristersson said at a joint press conference on Thursday.