But there was another photojournalist there, whom the others didn’t know: Rashid Talukder, who worked for a Bangladeshi newspaper. Though he also made dramatic images, he did not publish them. He couldn’t. Mr. Talukder knew that — unlike the foreign photographers — he would not leave Bangladesh and dash to the next overseas hot spot. He would be staying. And the men behind the executions were among the most powerful in the country.