Lessons from the spiderweb

Network Rail plans to introduce new drones this year that can fly beyond the line of sight of an operator. PAUL CLIFTON finds out why that could revolutionise the way the railway is managed

DEFENSE

Ukraine’s president: treading the path of the autocrat? ...

Originally supplanting paratroops as a means of delivering soldiers precisely onto the battlefield, air assault became the standard for strategic planning in the Cold War. But as air threats have escalated, has peer-on-peer conflict made the tactic obsolete?

Of the hundreds of thousands of asteroids in our solar system, it is all too feasible that one could strike Earth. If scientists discover this is likely to happen, what are our options for defending ourselves – and who will make the key decisions? Tomas Weber reports

State secrets Controversy of the week If the ...