FILE - Russian Tu-22M-3 long-range bombers fly during the Victory Day military parade marking 71 years after the victory in WWII in Red Square in Moscow, Russia, Monday, May 9, 2016.

Source: https://www.gjsentinel.com/news/us/why-would-russia-use-hypersonic-missile-in-strike-on-ukraine/article_d0120063-a100-5a82-bc0b-0fd8dd8e6421.html

May 9 is Victory Day in Russia, marking victory over Nazi Germany in 1945.

Source: https://www.cbc.ca/news/canada/saskatchewan/ukraine-russia-invasion-saskatchewan-refugees-1.6757713?cmp=rss

Several Russian regions have scaled back or cancelled Victory Day events, citing concerns that pro-Ukrainian saboteurs could target the proceedings.

Source: https://gazette.com/news/us-world/moscow-residents-report-sat-nav-disruption-before-victory-day-parade/article_5987e4b5-91db-5f91-af25-4831b2f07f8d.html