Factbox-After Trump's Turkey ruse, a look at past secret presidential trips

By Steve Holland WASHINGTON, Aug 12 (Reuters) - Closed aircraft window shades. A ballcap pulled low to hide the president's face. Seized cellphones. Strict warnings against leaks. These are all hallmarks of secret, unannounced trips made by American presidents to war zones and high-risk areas, a decades-old practice that has drawn new scrutiny after President Donald Trump sneaked off the regular Air Force One jet to take a separate plane as he left Turkey on July 8.