People stage a demonstration in Almere, the Netherlands, on Sunday, where thousands of empty shoes are laid out to commemorate Palestinian children killed in Israeli attacks. Since the Gaza conflict erupted in October 2023, more than 50,000 children have reportedly been killed or injured, according to a UNICEF report published in May. The agency said last week that "children will begin to die of thirst" as only 40 percent of Gaza's drinking water facilities remain functional.