The head of the official inquiry explains his theories on why the World Trade Center Towers collapsed.
"No building could have survived such a blow, expert after expert has said.But things are hardly that simple. No one has authoritatively explained why One World Trade Center remained standing for 1 hour and 40 minutes while Two World Trade Center crashed to the ground just 56 minutes after impact. Another mystery is why smaller, nearby structures remained standing even though fire and steel from the twin towers rained down on them and even ripped huge chunks out of their facades."
Thanks to Design Architecture
FULL STORY: How the twin towers collapsed

Maui's Vacation Rental Debate Turns Ugly
Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

In Urban Planning, AI Prompting Could be the New Design Thinking
Creativity has long been key to great urban design. What if we see AI as our new creative partner?

Portland Raises Parking Fees to Pay for Street Maintenance
The city is struggling to bridge a massive budget gap at the Bureau of Transportation, which largely depleted its reserves during the Civd-19 pandemic.

Spokane Mayor Introduces Housing Reforms Package
Mayor Lisa Brown’s proposals include deferring or waiving some development fees to encourage more affordable housing development.

Houston Mayor Kills Another Bike Lane
The mayor rejected a proposed bike lane in the Montrose district in keeping with his pledge to maintain car lanes.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Gallatin County Department of Planning & Community Development
Heyer Gruel & Associates PA
JM Goldson LLC
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Jefferson Parish Government
Camden Redevelopment Agency
City of Claremont