A.M. Headlines

(Washington Post): "Police kill one suspect in Marathon bombing, manhunt underway for second"

(Boston Globe): "One suspect in custody, another remains on the loose"

(New York Times): "Region on lockdown as police hunt for second suspect"

(The Atlantic Wire): "An officer's been killed and there's a shooter on the loose at MIT"

(Politico): "Gun control: President Obama's biggest loss"