Have you seen inside of an escalator?! The wheels for each step ride along track on the inside. They make sure that the steps are level at all times. Trump effect on NATO spending is 'staggering ...

Sarah Aucoin was in high spirits as she stepped on to the ascending escalator at Boston’s Back Bay station a few minutes ...

For all cases, the maximum displacement of the step was less than 4mm, satisfying part of the requirements from BS EN 115-1, 2008. IDAC carried out analyses on a die-cast and fabricated escalator step ...