Brazil's President Dilma Rousseff bites on her fingernail during a signing ceremony for land reform agreements, at the Planalto Presidential Palace, in Brasilia, Brazil, Friday, April 1, 2016. Rousseff, who is battling the biggest recession in decades and a corruption probe that has circled in on members of her inner circle, is facing impeachment proceedings in Congress on allegations she violated fiscal laws. (AP Photo/Eraldo Peres)/ERA102/1604011724086824//1604041320