Myron operates heavy equipment as part of his construction job. Myron has a medical marijuana card due to his anxiety and depression. His employer has a strict no-drug policy because of safety considerations. One afternoon, Myron smoked marijuana in his vehicle while on his break. Myron returned to work and was observed to be under the influence. Myron was terminated following the incident. Myron sued, claiming his employer failed to provide him with a reasonable accommodation under the Americans with Disabilities Act (ADA). 

What are Myron’s chances of success? Provide a complete analysis under ADA.