Satellite imagery reveals ongoing construction at the Dimona nuclear site in Israel, home to its clandestine nuclear weapons program. Israel possesses an estimated, though unconfirmed, arsenal of nuclear warheads, operating outside international inspection. This ambiguity allows the US to provide military aid without violating laws restricting support for unsafeguarded nuclear programs. The Dimona site houses a heavy water reactor, operational since the 1960s, which experts believe produces plutonium and tritium. The AP suggests the new construction could be a new reactor, expanding Israel's capacity to build or service nuclear weapons. The current reactor's longevity raises concerns about the need for replacement or upgrades. Arms Control Association suggests the construction aims to maintain plutonium production or maintain/build warheads. This report emerges amid tensions regarding Iran's nuclear program, which has been criticized while Israel's program remains hidden. Iran highlights Israel's non-compliance with the Non-Proliferation Treaty. The Dimona site’s secrecy and potential expansion raise concerns about nuclear proliferation.