In 1986, the British defence secretary Michael Heseltine, a prominent critic of the Special Relationship and a supporter of European integration, resigned over his concern that a takeover of Britain's last helicopter manufacturer by a US firm would harm the British defence industry. Thatcher herself also saw a potential risk to Britain's deterrent and security posed by the Strategic Defense Initiative She was alarmed at Reagan's proposal at the Reykjavík Summit to eliminate nuclear weapons, but was relieved when the proposal failed.