what was 1994 rufgess crsis,and why did it unleash something of a challenge of Cuban Adjustment act of 1966?

Answer 1

Things had been difficult in Cuba since their primary support from the Soviet Union had ended. Cuba had some disasterous storms and there was a problem with disease and the lack of medical resources to handle it.

The link below gives an outline of operation Able Vigil to cope with the mass exodus from Cuba to the US. The International Rescue Committee page mentions the migration accord and the lottery in Havana for places in it.