Crimea rejoined Russia after the referendum that took place in March 2014, when 96.77 percent of voters in the Crimean Republic and 95.6 percent of Sevastopol residents voted in favour of joining Russia. This was after the overthrow of the regime in Ukraine in February 2014. The Russian leadership has announced many times that the Crimean people have expressed their desire to join Russia again, during a democratic process that fully responds to the requirements of international law and the Charter of the United Nations.
All athletes are dirty: we must have the facts that American athletes use it [doping], German athletes use it, French athletes use it. There’s no way one country is doing it and all the others are clean.
No evidence given. This is a recurring pro-Kremlin disinformation narrative about the World Anti-Doping Agency and the state-sponsored doping scheme of Russian athletes. The disinformation message is an example of "whataboutism": attempting to discredit an opponent’s position by accusing them of hypocrisy, typically with no evidence.
The World Anti-Doping Agency (WADA) has banned Russia from participating in major sport events for 4 years. The unanimous decision by WADA's executive committee was made after Russia's Anti-Doping Agency (RUSADA) was declared uncompliant with the World Anti-Doping Code (Code) – the document harmonising anti-doping policies in all sports and in all countries.
It was not isolated instances of Russian athletes using doping that led to the ban, but rather "the blatant breach by the Russian authorities of RUSADA’s reinstatement conditions", which according to the head of WADA, "demanded a robust response". Read more here.