Once granted a waiver, you can obtain a visa (usually one year at first). As a holder of a waiver you can expect long delays in secondary processing at the US border, even with a visa in your passport. Strangely, an exception to this is purely political offences..
Most simply explained, a constructive trust is an equitable remedy imposed to prevent unjust enrichment (see Simonds v Simonds, 45 NY2d 233, 242 [1978]; Sharp v Kosmalski, 40 NY2d 119 [1976]).
A testamentary trust is a legal arrangement created as specified in a person's will, and is occasioned by the death of that person. It is created to address any estate accumulated during that person's lifetime or generated as a result of a postmortem lawsuit, such as a settlement in a survival claim, or the proceeds from a life insurance policy held on the settlor.