BRUSSELS/ ISTANBUL In efforts to curb irregular migration, the EU is preparing to legalize "return hubs" in third countries. It is a move criticized for potentially leading to human rights violations. European Commission President Ursula von der Leyen presented her “return strategy” to the European Parliament on March 11, listing it among her priorities for the first 100 days of her second term, which began Dec. 1. Von der Leyen first disclosed the contents of the strategy last summer in a