Army Private Bradley Manning is escorted away from his Article 32 hearing February 23, 2012 in Fort Meade, Maryland. (Photo by Mark Wilson/Getty Images)

Supporters of Army Pfc. Bradley Manning will gather at Fort McNair in Southwest D.C. tomorrow, one day after closing arguments were presented at his court marital for leaking classified documents to Wikileaks.

Maj. Gen. Jeffrey S. Buchanan, the man who can reduce Manning’s sentence, is stationed at Fort McNair, which is located in the now buzzing Buzzard Point. Demonstrators will attempt to deliver a petition to Buchanan, according to a press release. The event, which is scheduled to run from 3 p.m. to 5:30 p.m., will also feature speakers and “protest puppets.”

Manning has admitted to leaking classified documents, a crime which carries a 20-year sentence. But he was also charged with aiding the enemy, a charge Amnesty International called a “travesty of justice.” If convicted, Manning could be sentenced to life in prison without the possibility of parole.

“The charge of ‘aiding the enemy’ is ludicrous,” Widney Brown, Amnesty International’s senior director of international law and policy, said in a statement. “What’s surprising is that the prosecutors in this case, who have a duty to act in the interest of justice, have pushed a theory that making information available on the internet – whether through Wikileaks, in a personal blog posting, or on the website of The New York Times – can amount to ‘aiding the enemy’.”

Maj. Ashton Fein, who is prosecuting the military’s case against Manning. argued today that Manning wanted to “guarantee his fame” by leaking the documents and knew doing so would harm the United States. David Coombs, Manning’s lead defense attorney, has yet to present his closing argument. Sentencing is expected to begin July 31.