The United States hit Venezuela with a “large-scale strike” early Saturday and said its president, Nicolás Maduro, had been captured and flown out of the country after months of stepped-up pressure by Washington — an extraordinary nighttime operation announced by President Donald Trump on social media hours after the attack. Multiple explosions rang out and low-flying aircraft swept through Caracas, the capital, as Maduro's government immediately accused the United States of attacking civilian and military installations.