Authorities are probing a trench collapse that killed two construction workers, who were identified by The Port Authority of New York and New Jersey as Francisco Reyes, 41, and Fernando Lagunas Pereira, 28.

Five contractor employees and construction inspector died when a car entered their Interstate-695 work zone at high speed through a barrier gap.

As government pressure mounts on Norfolk Southern to conduct and pay for comprehensive area cleanup, Arcadis and AECOM have been hired to assist.

International Accreditation Services has certified two programs and union leaders are seeking certification for a third.

Building inspectors issued a stop work order at a mid-block construction site in Manhattan and ordered the evacuation of a nearby building with signs of damage.

Arizona officials adopted rules and passed laws to achieve compliance with national safety requirements.

NTSB says that "all aspects of the collapse remain under investigation."

Fabio Pires, 31, an electrical engineer and union operating mechanic died last year after sustaining severe burns, but the Massachusetts firm disputes agency conclusions in proposing total of five serious and willful violations against it.

Line owner-operator TC Energy says it has recovered most of the 14,000 barrels that spilled last month but an 800-person response team remains activated to address environmental damage

Crude oil spill in Kansas is contained but not fully cleaned up, as fed agency allows full line operation and Canadian owner TC Energy has yet to state pipeline rupture cause.