No, as far as we know residents of the United States can't participate in
the A2A tokens distribution because of the US laws. You can participate
in the STeX ICO if you are neither a Hong Kong or U.S. citizen or
permanent resident of the United States, nor have a primary residence
or domicile in the United States, including Puerto Rico, the U.S. Virgin
Islands, and any other overseas territories of the United States.
Additionaly, as we have no ability to check participants residency
because of blockhain technology used in Ethereum network, and/or
their country regulations, final decision about legal ability to join this
project as an A2A token holder must be made by participants
themselves