Cross walkers

And it’s not a “Christmas tree” for funny cars: Our Street Smarts columnist unveils the answer as to why some traffic lights don’t turn yellow when the crosswalk timer counts down to zero.

Turns out those timers are meant for pedestrians, not motorists, so you can stop pretending it’s a countdown to blast off.

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Along with presiding over the Senate, it’s one of his duties: A cluster of party balloons floated over the White House and resulted in a security alert when they landed on the grounds of the executive mansion.

“Very sorry. I was making balloon animals for a children’s party down the street and a few got away” said Vice President Joe Biden.

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Don’t know much about history: On this day in 1984, Surgeon General C. Everett Koop issued a report that found “very solid” evidence linking second-hand smoke to lung disease in non-smokers.

Tobacco companies denied the link and also demanded to know why non-smokers were using their products without paying for them.

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