PEEKSKILL - Dozens of environmental activists held a protest over Indian Point today on the third anniversary of the tsunami and earthquake that caused a nuclear meltdown in Japan.

Protesters marched from the Indian Point Nuclear Power Plant in Buchanan to the Peekskill River Front Green, demanding the closure of the plant.

Environmental groups say Indian Point operators and federal regulators must learn from the nuclear disaster in Japan, saying people would be in danger if there was a similar disaster in the Hudson Valley.

The U.S. Nuclear Regulatory Commission has approved Entergy's emergency plan and federal judges ruled the approval was reasonable. However, activists say road construction would hamper drivers trying to evacuate.

Last month, NY Attorney General Eric Schneiderman blasted federal regulators and Indian Point's operator, Entergy, saying their estimate of the cost of an emergency cleanup is off and that it could actually top $1 trillion. A spokesperson for Entergy says the emergency plan was properly approved by the NRC.