Thieves steal $4 million diamond necklace in brazen smash-and-grab heist

By Oscar Holland, CNN (CNN) — Unmasked thieves smashed open a glass display case with a hammer before stealing a diamond-encrusted necklace worth more than $4 million during a brazen daylight museum heist in Vienna, Austria on Thursday. Austrian police say a manhunt is now underway for the two men, who posed as visitors to