(Full headline) Pictured: Two of the hostages shot by Islamic extremist during siege at Jewish grocery store, as it emerges one shopper was executed when he grabbed one of terrorist's guns and it JAMMED excerpt- One hostage is said to have snatched one of terrorist Amedy Coulibaly's guns in the kosher grocery. Captive turned the weapon on the extremist - only to find it had been left on a counter because it was jammed The first pictures of two of the four hostages killed in yesterday's kosher supermarket siege in Paris have emerged. Yohan Cohen, 22, Yoav Hattab, 21, Philippe...