New footage appears to show the minutes leading up to the arrest of Columbia University graduate and Palestinian activist Mahmoud Khalil. The video, first obtained by CNN was secured by Khalil’s legal team through a subpoena of Columbia University and shows an interaction between Khalil, his wife and immigration officers. Khalil has been in custody since March. He played a prominent role in helping organize protests against the Israel-Hamas war on the Columbia campus last year. Secretary of...