WASHINGTON -- Todd Lyons, the acting head of Immigration and Customs Enforcement, defended his agency's officers before Congress on Tuesday, standing behind their tactics and saying they would not be intimidated as they carry out the president's mass deportation plans. Lyons was one of the three heads of agencies implementing President Donald Trump's immigration agenda to testify in a hearing called after the shooting deaths of two Americans at the hands of federal officers. They faced fierce questioning from Democrats, and support from most Republicans, over how they are prosecuting immigration enforcement inside American cities. "Let me send a message...