US
Certain actions and reactions lock rival nations on a course that grows harder and harder to change
'China, India and Pakistan are also increasing the size of their arsenals'
At 4pc of GDP, Pakistan's military burden at highest level since 2004; country was 20th-largest spender in 2018
Worldwide military spending also rose by 2.6%
A Sweden-based think tank says Israel, the US and France increased their arms exports to New Delhi during 2014-18
US, Russia, Britain, France, China, India, Pakistan, Israel and North Korea have 15,395 nuclear warheads in 2016
Country is tenth largest arms importer in the world, says new report