Well meaning social critique, but lacking clarity
Although I appreciate your message that landmines are a problem and are the result of wars, you blaming the US for this is illogical and unjusitified. The US has not used landmines against civilians in any recent war, and although enemies of the US have used landmines against us, I don't feel that the rationale for faulting this on US hegemony is lacking if not nonexistant. As well, the intrests on the UN are largely dominated by US hegemonic intrests, so potraying them as opposed to the US is highly inaccurate.
As far as landmines go, you refrain from mentioning any nations or wars, and thus your entire project comes off as an idealistic and vague rant against an intangible antagonist.