Is there any scientific evidence about planet 9? has it been discovered yet? is there any type of life on it?

I don't belev there will b another planetthey took Pluto off cause it was too small to b co side red as a planet as there r lots of other stars or whatevr that size...I cud b wrong in this idk

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey