 
 <prompt> Wetin fit dey dangerous for jet wey dey land or dey take off? Based on di question wey dey above, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Airport construction bin dey boom during di 1960s wit di increase for jet aircraft traffic. Runways dem dey extend reach 3,000 m (9,800 ft). Di fields dem dey construct out of reinforced concrete using a slip-form machine wey dey produce continual slab wit no disruptions along di length. Early 1960s also see di introduction of jet bridge systems to modern airport terminals, an innovation wey eliminate outdoor passenger boarding. These systems don dey common for United States by di 1970s. 