Mothers of Venezuelan anti-government students hold a Venezuelan national flag during a protest against the government of Venezuelan President Nicolas Maduro in San Cristobal, capital of the western border state of Tachira, Venezuela, on February 21, 2014. At least eight people have been killed, 137 wounded and more than 100 detained in the protests shaking Venezuela, officials said Friday, confirming a jump in the death toll. AFP PHOTO/Luis ROBAYO        (Photo credit should read LUIS ROBAYO/AFP/Getty Images)