1 curb:someting that restrains or holds back 2 to wobble: to move, rock, or sway unsteadily, to tremble

Link to present incidents:
Germany Orders Curbs at Border in Migrant Crisis

Germany has said it expects 800,000 migrants by year’s end, but has indicated up to now that it can handle the newcomers, and even welcomed their addition to its aging work force.
But the numbers arriving have continued to grow, and Germany’s humanitarian network is wobbling under the strain.
(The New York Times)