A son of the president of Russia's Tatarstan region was named among 50 people thought to have been killed in a plane crash in the region's capital.
Rustam Minnikhanov's son, Irek, was on the flight from Moscow to Kazan, according to a passenger list posted by news websites whose authenticity was confirmed by the regional government.
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The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.
There will be some brightness, with the best of the sunshine towards the south and southeast where it will again be chilly.