The Uranium...
... was sealed by the IAEA in the 90s and was still there when the US came to remove it in 2004.
And the cyclosarin was old and useless.
Tests indicated some warheads contain cyclosarin, more powerful than sarin, Polish officials say.
But the US military said that while two of the rockets tested positive for sarin, traces of the agent were so small and deteriorated as to be virtually harmless.
"These rounds were determined to have limited to no impact if used by insurgents against coalition forces," a statement by the military said.