Nuclear spies use earth and skies to up their game

摘要

Iran 5 nuclear prowess is growing, fuelling a range of global tensions, Are scientists' abilities to sniff out covert nuclear weapons tests keeping up? Two new techniques could at least make it harder for countries to develop nuclear weapons on the sly. Last week, the Iranian government flaunted its growing nuclear might, unveiling a suite of more efficient centrifuges for enriching uranium, Though it insists this is only for peaceful purposes like generating electricity, the US and other western nations have suggested Iran may be secretly developing nuclear weapons.