How does the United States Constitution provide for a system of checks and balances?

Why did the united states become involved in the soviet-afghan war? the united states wanted access to the afghan oil fields. the united states wanted to retaliate against the soviet boycott of the 1984 olympics in los angeles. representative charlie wilson convinced congress to fund afghan resistance to soviet influence. president ronald reagan wanted to force the soviets to withdraw from afghanistan.

Does anyone know the song that xxxtentacion sings and when he says "hey is your neck game sloppy' i need to know what son that is hurry

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by