What is the fine-grained topic of the following text: Manning, a U.S. Army whistleblower, had been subpoenaed by federal prosecutors in Virginia's Eastern District to appear for questioning about her 2010 leak to WikiLeaks of hundreds of thousands of State Department and Pentagon documents about the U.S. wars in Iraq and Afghanistan. Only return the topic.
Manning's subpoena for questioning about her 2010 WikiLeaks leak