Delhi chokes with 'very poor' air quality again

The national capital's air quality slipped into the "very poor" category on Friday morning, and was expected to decline sharply over the weekend owing to changing weather and "significant" stubble......

Drones steal the show at Aero India 2019

These unmanned aerial vehicles can fly at high speeds, detect intruders, do aerobatic maneuvers like loops, rolls, spins, and hammerheads effortlessly and communicate with each other......