How to file VA burn pit respiratory claim (PACT Act 2022 specific subspecialty)

5-step Schema.org HowTo for LARGEST presumptive expansion in VA history. ~3.5M post-9/11 vets deployed to qualifying locations (Iraq, Afghanistan, Syria, Egypt, Lebanon, Yemen, Djibouti, Somalia, Saudi Arabia, Kuwait, Qatar, UAE, etc.). 38 CFR 3.320 + 3.321 burn pit framework. Conditions: asthma post-deployment, COPD, bronchiolitis, granulomatous disease, sarcoidosis, sinusitis, rhinitis, brain/GI/head-neck/kidney/lung/breast cancers, hypertension. AHOBPR registry. Pre-PACT denied claims refile pathway. Joint Base Balad burn pit history.