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Twitter and terrorism, Diageo and the SEC, and drug testing gamers

U.S. stocks are sliding (^DJI, ^GSPC, ^IXIC) for the fourth straight day as weak quarterly earnings - aside from Amazon (AMZN) - are weighing on the broader market.

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Here are some of the other stories Yahoo Finance is keeping and eye on today.

Twitter and Terrorism

Some big tech names like Google (GOOGL), Facebook (FB), Twitter (TWTR) and yes, our own parent Yahoo (YHOO) are pushing back against potential legislation that would require them to alert authorities of possible terrorist attacks mentioned on their networks.

SEC investingating Diageo
Beverage giant Diageo (DEO), owner of popular brands such as Guinness, Smirnoff and Johnny Walker is under the SEC microscope. The regulator is looking into claims that Diageo is shipping excess inventory to distributors to artificially inflate sales figures.

Big business, big buildings
Apple (AAPL) is famously constructing a new space-ship like home office, Tesla (TSLA) has their gigafactory but other companies are doing the exact opposite and selling off their fancy headquarters. Most recently the spun off broadcasting arm of Gannett - Tegna (TGNA) - sold its Virginia headquarters for $270 million. Are fancy new headquarters a good use of capital?

Gamer doping
Move over Lance Armstrong and Alex Rodriguez - there's a new crop of dopers out there. Video gamers! The Electronic Sports League is one of the biggest in competitive gaming and they are going to start drug testing at a competition next month.