Venezuelan opposition leader and self-proclaimed acting president Juan Guaido stands under the national flag during a gathering with supporters after members of the Bolivarian National Guard joined his campaign to oust President Nicolas Maduro, in Caracas on April 30.

Venezuelan opposition leader and self-proclaimed acting president Juan Guaido stands under the national flag during a gathering with supporters after members of the Bolivarian National Guard joined his campaign to oust President Nicolas Maduro, in Caracas on April 30.