European leaders are again scrambling to revive Greece's faltering economy, as Athens faces another crushing round of debt payments it can't afford.

Protesters shout slogans during a demonstration against a new package of tax hikes and reforms in front of the parliament building in Athens, Greece, May 22, 2016.

Less than a year after the country's third international bailout, Greek lawmakers on Sunday approved another round of painful tax hikes and spending cuts in hopes of securing more cash from its skeptical European neighbors. The infusion is needed to help Greece make good on bond payments due in July.