The document discusses the threats to US homeland security in 2011, including jihadist groups like al Qaeda, lone wolves, Mexican drug cartels, and domestic extremism. It identifies the Mexican drug war and potential corruption of US law enforcement as the greatest dangers. Key challenges are the 10th anniversary of 9/11, threats from Yemen and Somalia, continuing violence in Mexico, and uncertainty around how the new Congress will approach homeland security issues like border security and immigration. Vigilance and awareness are emphasized as important defenses.