Solid concrete models of the proposed 10-meter-tall wall will be followed by other prototypes using alternate materials, likely including walls with 'windows'
Company already begun installing its solar roofs, but until now, it has been making them on a small scale near its vehicle factory in Fremont, California
Moves come just months before presidential and parliamentary elections
Mexican, Canadian officials see US president’s combative rhetoric as part of negotiating strategy to wring concessions
For decades governments of the left and right have tried to reform France's strict labor rules, but have always diluted them in the face of street protests
The shortage of labor in Texas is likely to grow worse, many builders warn