Instead of stepping out in Hamburg, Germany, first lady Melania Trump is staying in her hotel room.
Trump was supposed to visit Germany's Climate Computing Center for a lesson about climate change with the other G-20 leaders' spouses, but her spokeswoman said she was forced to stay in her room because "Hamburg police couldn't provide clearance for us to leave."
An anti-capitalist protest called "Welcome to Hell" turned violent Thursday night. Protesters threw rocks and bottles at police, who sprayed high-powered water cannons at the crowd.
Trump tweeted: "Thinking of those hurt in #Hamburg protests. Hope everyone stay safe!"