With the exit of U.S. troops from Iraq, Iranian arm's chief says Iran is ready to boost military ties between the two countries. In recent news, Iran's navy warned off a foreign helicopter that flew near Iranian territory. CNN's Ali Velshi discusses whether Iran's latest act was just military posturing or should the U.S. be concerned?

CNN's Erin Burnett talks to Congresswoman Gabrielle Giffords' intern Daniel Hernandez about his role in saving her life.