The companies that laid fiber optic cable during the Internet bubble went out of business, going bankrupt.

True if the companies that built most of the fiber-optic capacity during the late-1990s and 2000 bubble (for example Global Crossing, 360networks, Level 3, Williams Communications, FLAG, WorldCom) largely went bankrupt or out of business. Mostly true if many or most of the major builders went bankrupt, with a few notable survivors. Mixed if roughly half went bankrupt. Mostly false if only some went bankrupt and many major builders survived, so the claim overgeneralises a real pattern. False if most of the major builders did not go bankrupt or out of business.

Set before the research began.

1. E1 Report: Undersea Cable Market Has Sunk Light Reading · 17 March 2003

   “This is good news in a sector where many once high-flying companies like 360networks Inc., Global Crossing Holdings Ltd., and Flag Telecom Group Ltd. (OTC: FLHLQ) were forced into bankruptcy following massive builds that were never met with commensurate demand”

2. E2 Flag emerges in harsh climate EE World Online (reprint of The Daily Deal, copyright The Deal L.L.C.) · 9 October 2002

   “Global bandwidth merchant Flag Telecom Holdings Ltd. officially emerged from bankruptcy on Wednesday, Oct. 9, about six months after filing for Chapter 11 protection.”

3. E3 Telecom Bankruptcy Wave May Become Self-Perpetuating Los Angeles Times · 25 July 2002

   “Williams, which filed for bankruptcy protection in April with $7.15 billion in debt, plans to emerge from Chapter 11 this fall with debt of $525 million.”

4. E4 Telecom Bankruptcy Wave May Become Self-Perpetuating Los Angeles Times · 25 July 2002

   “However, rival Level 3 Communications Inc. this week made an unsolicited bid to buy the company out of bankruptcy protection with an offer worth about $650 million.”

E1 reports that 360networks, Global Crossing and FLAG Telecom were forced into bankruptcy after massive builds that demand never matched, and E2 confirms FLAG's Chapter 11 filing. E3 shows Williams filed for bankruptcy with $7.15 billion in debt. E4 shows Level 3 was still operating in 2002 and making a bid to buy a company out of bankruptcy, so it was a notable survivor. Bankruptcy was widespread among the major builders but not universal, and some, such as FLAG, emerged from Chapter 11 rather than going out of business. That fits "mostly true" under the criteria.