Man angry with son-in-law fingers him as terrorist to FBI
"...father-in-law wrote an email to the FBI saying the son-in-law had links to al-Qaeda in Sweden and that he was travelling to the US to meet his contacts. The son-in-law was arrested upon landing in Florida. He was placed in handcuffs, interrogated and placed in a cell for 11 hours before being put on a flight back to Europe..."
You can sue your local police department for wrongful arrest. Can you sue the US Government? Can you sue the US Government as a foreign citizen?