A New York mother jumped off Niagara Falls with her two children – with all three dead, including a five-month-old baby. Chaianti Means, 33, stepped over the guardrail at Luna Island Monday night, where a popular overlook looms over the falls’ nearly 200-foot drop. Police responded to the scene around 9 p.m., according to WIVB, with investigators determining the jump was “intentional in nature.” “The circumstances remain under investigation,” New York Park Police added