In addition to the ceremony video and photo gallery released by the Construction Authority, you can read about and watch the historic groundbreaking through some of the media coverage highlighted below:
$1.5 billion Glendora-to-Montclair Gold Line extension breaks ground, ceremony attended by 700 people – Pasadena Star-News/San Gabriel Valley Tribune/Inland Valley Daily Bulletin
http://www.sgvtribune.com/2017/12/02/glendora-to-montclair-gold-line-extension-breaks-ground-ceremony-attended-by-700-people/
VIDEO: Officials break ground in Glendora for Metro Gold Line extension – ABC 7
http://abc7.com/traffic/officials-break-ground-in-glendora-for-metro-gold-line-extension/2729334/
VIDEO: Work Begins on $1.5B Metro Gold Line Extension To Montclair – CBS 2/KCAL 9
http://losangeles.cbslocal.com/2017/12/02/metro-gold-line-extension/
Extension of Gold Line rail system to San Bernardino County breaks ground – Los Angeles Times
http://www.latimes.com/local/lanow/la-me-gold-line-20171202-story.html
LA Metro comienza la extensión de 12 millas de la Gold Line – La Opinion
https://laopinion.com/2017/12/02/la-metro-comienza-la-extension-de-12-millas-de-la-gold-line/
Groundbreaking ceremony held for Gold Line extension to Claremont and Montclair – The Source
http://thesource.metro.net/2017/12/02/groundbreaking-ceremony-held-for-gold-line-extension-to-claremont-and-montclair/
Construction begins on Gold Line extension to Montclair – Curbed LA
https://la.curbed.com/2017/12/3/16731006/gold-line-extension-construction-metro
LA Metro breaks ground on 12-mile Gold Line extension – KPCC
https://www.scpr.org/news/2017/12/02/78468/la-metro-breaks-ground-on-1-5b-gold-line-extension/
Officials Break Ground on New $1.5 Billion Metro Extension – KFI AM 640
https://kfiam640.iheart.com/content/2017-12-02-officials-break-ground-on-new-15-billion-metro-extension/
First Major Measure M Project Moves into Construction – American Journal of Transportation
https://www.ajot.com/news/first-major-measure-m-project-moves-into-construction
Groundbreaking Celebrated for Foothill Gold Line Extension 2B, Though Some Issues Remain – Streetsblog LA
https://la.streetsblog.org/2017/12/04/groundbreaking-celebrated-for-foothill-gold-line-extension-2b-though-some-issues-remain/
Gold Line Breaks Ground on $1.5-Billion Glendora to Montclair Phase – ENR
https://www.enr.com/blogs/12-california-views/post/43569-gold-line-breaks-ground-on-15-billion-glendora-to-montclair-phase