North Korea claims to develop Hydrogen bomb: Chronology of Pyongyang's missile development programme

North Korean state media claimed Sunday that the country had developed a thermonuclear warhead that could be fitted into its new intercontinental ballistic missile, in the latest brazen assertion of its weapons capabilities.The official Korean Central News Agency said leader Kim Jong-Un had inspected a miniaturised H-bomb that could be loaded onto a missile — although doubts remain over the veracity of Pyongyang's claims.[caption id="attachment_3918691" align="alignleft" width="380"]

Representational image. AP[/caption]Here are key dates in the North's quest to develop a nuclear-tipped missile capable of hitting the United States:Late 1970s: North Korea starts working on a version of the Soviet Scud-B (range 300 kilometres or 185 miles). Test-fired in 19841987-1992: Begins developing variant of Scud-C (range 500 km), Rodong-1 (1,300 km), Taepodong-1 (2,500 km), Musudan-1 (3,000 km) and Taepodong-2 (6,700 km)August 1998: Test-fires Taepodong-1 rocket over Japan in what it calls a satellite launch — the US and others say it is a missileSeptember 1999: Declares moratorium on long-range missile tests amid improving ties with USJuly 12, 2000: Fifth round of US-North Korean missile talks ends without agreement after North demands $1 billion a year in return for halting missile exports3 March, 2005: Pyongyang ends moratorium on long-range missile testing, blames Bush administration's "hostile" policy5 July, 2006: Test-fires seven missiles, including a long-range Taepodong-2 which explodes after 40 seconds9 October, 2006: Conducts underground nuclear test, its first5 April, 2009: Launches long-range rocket which flies over Japan and lands in the Pacific, in what it says is an attempt to put a satellite into orbit. The United States, Japan and South Korea see it as a disguised test of a Taepodong-225 May, 2009: Conducts its second underground nuclear test, several times more powerful than the first13 April, 2012: Launches what it has said is a long-range rocket to put a satellite into orbit, but which disintegrates soon after blast-off12 December, 2012: Launches a multi-stage rocket and successfully places an Earth observational satellite in orbit12 February, 2013: Conducts its third underground nuclear test6 January, 2016: Conducts its fourth underground nuclear test, which it says was a hydrogen bomb — a claim doubted by most experts9 March, 2016: Kim Jong-Un claims the North has successfully miniaturised a thermo-nuclear warhead23 April, 2016: Pyongyang test-fires a submarine-launched ballistic missile8 July, 2016: US and South Korea announce plans to deploy an advanced missile defence system -- THAAD (Terminal High Altitude Area Defense)3 August, 2016: North Korea fires a ballistic missile directly into Japan's maritime economic zone for the first time9 September, 2016: Conducts fifth nuclear test, its most powerful to date6 March, 2017: Fires four ballistic missiles in what it says is an exercise to hit US bases in Japan7 March, 2017: US begins deploying THAAD missile defence system in South Korea14 May, 2017: North Korea fires a ballistic missile which flies 700 kilometres before landing in the Sea of Japan. Analysts say it has an imputed range of 4,500 kilometres (2,800 miles) and brings Guam within reach4 July, 2017: Test-fires a ballistic missile that analysts say brings Alaska within reach. Pyongyang later says it was a "landmark" test of a Hwasong-14 intercontinental ballistic missile (ICBM)28 July, 2017: Launches a missile with a theoretical range of 10,000 kilometres, meaning it could hit much of the United States26 August, 2017: Fires three short-range ballistic missiles29 August, 2017: Fires ballistic missile over Japan and into the Pacific, acknowledging for the first time that it has done so. South Korea says it flew around 2,700 kilometres at a maximum altitude of about 550 kilometres3 September, 2017: State media show leader Kim Jong-Un inspecting what it professes to be an H-bomb that can be loaded onto an ICBM. The claims have not been confirmed