The US government is proposing a $30m deal selling up to 100 laser-guided bunker-busting bombs to Israel.
The GBU-28 is a 2,000-kg conventional weapon with a powerful warhead that can burrow through six metres (20 feet) of concrete or 30 metres of earth.
The sale has gone ahead despite concern that Israel might use the weapon for a unilateral attack against Iran.

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