Conservatives criticized the president for "passive" responses to crises such as the 2009 Iranian protests and the 2011 Egyptian revolution. Additionally, liberal and Democratic activists objected to Obama's decisions to send reinforcements to Afghanistan, resume military trials of terror suspects at Guantanamo Bay and to help enforce a no-fly zone over Libya during that country's civil war. However, the demands of anti-war advocates were heeded when Obama followed through on a campaign promise to withdraw combat troops from Iraq.