War casts shadow over Russia's Victory Day celebrations.

A series of mysterious incidents, including a drone attack on the Kremlin, is revealing cracks in Russia's facade of strength. The Kremlin eventually described the incursion as an assassination attempt on President Putin by the "Kyiv regime" and added the US to its accusation of blame for the blast. The cancellation of some of the Victory Day festivities is another sign that appearances are beginning to slip. The tension in the capital is palpable, and much will hinge on Putin's yearly Victory Day speech on Red Square.