Obama calls for nuclear-free world
Barack Obama has promised that the US will do all it takes to achieve a world without nuclear weapons.
In a major speech on Sunday in Prague, the capital of the Czech Republic, the US president said Washington would take "concrete steps" to reduce its nuclear arsenal and encourage other nations to do the same.
He said countries needed to co-operate and have patience to achieve a nuclear-free world.
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As long as you have the Hitlers, the Idi Amin's , the Kim's, the Russians, and especially the United States, there will be Nuclear weapons.