The US is a lucky charm – and reliable partner – for Irish businesses

With just 5 million people, Ireland ranks sixth globally for foreign direct investment in US, above Italy and Mexico

More than 80 years since helping develop the nuclear bomb, Oak Ridge National Laboratory in the mountains of eastern Tennessee remains a critical piece of the US government's research-and-development infrastructure.

Inside its walls lie the world's fastest supercomputer; fusion, fission and neutron research projects; and thousands of expert scientists and researchers.