September 22, 2001 Source: The Denver Post https://denverpost.newsbank.com/search?text=%22Vigil%20crowd%20overwhelms%20Muslim%20site%3A%203%2C000%20visit%20mosque%20in%20s On September 22, 2001, The Denver Post reported, "Vigil crowd overwhelms Muslim site: 3,000 visit mosque in support."