As such, the Mass Transit Railway (MTR) added platform safety doors to all of its 84 stations, finishing the multi-year construction project in 2011.
BBC: Subway systems by the numbers
The same qualities of size, mass and high stance that give truck drivers a sense of safety and security actually create serious challenges.
FORBES: The Most Dangerous Trucks of 2011
Some other mass-market brands also have their equivalent, like the Toyota Safety Connect system.
FORBES: Luxury-Car Tech Helped Catch Boston Bombing Suspects; Your Chevy Probably Has It, Too
Know what these weapons of mass destruction do, know who is trying to stop research on gun safety, know what organizations are pushing for more comprehensive bans.
CNN: Gun control: It's on all of us
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