; (B) hearing dogs for those who have lost their hearing later in life by alerting to alarms, door bells, sirens, and more; (C) service dogs for those with other physical disabilities that are specially trained to provide balance, retrieve dropped items, open and close doors, turn on and off lights, carry a backpack, and more; (D) facility dogs which are specially trained to spend time working with wounded veterans recovering at military hospitals and veterans medical centers; (E) dogs that work with physical and occupational therapists as they treat soldiers and become an essential part of the healing process; and (F) PTSD service dogs that are trained to help mitigate the symptoms of PTSD by providing the emotional and physical support a veteran may need. 3. Coin specifications (a) Denominations The Secretary of the Treasury (hereafter in this Act referred to as the Secretary ) shall mint and issue the following coins in commemoration of the invaluable service that working dogs provide to society. (1) $5 gold coins Not more than 50,000 $5 coins, which shall— (A) weigh 8.359 grams; (B) have a diameter of 0.850 inches; and (C) contain 90 percent gold. (2) $1 silver coins Not more than 500,000 $1 coins, which shall— (A) weigh 26.73 grams; (B) have a diameter of 1.500 inches; and (C) contain not less than 90 percent silver. (3) Half-dollar clad coins Not more than 750,000 half-dollar coins which shall— (A) weigh 11.34 grams; (B) be struck on a planchet having a diameter of 1.205 inches