A large motorcade and security detail has been deployed for the former president and first lady's trip, with many plain-clothes guards seen alongside them throughout their appearances.

Source: https://www.dailymail.co.uk/news/article-12025991/Barack-Michelle-Obama-hold-hands-stroll-Barcelona-Stephen-Spielberg.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Two of the car’s three occupants were then spotted nearby by a plain-clothes officer a few minutes later, with the officer following them into a shop on St Peter’s Retail Park.

Source: https://www.chad.co.uk/news/crime/heroin-stash-found-in-suspects-underpants-after-arrest-in-mansfield-4245376