remember, this is the site of where that active shooting was in 2013 that took the lives of 12 people. the huge response under scores the government's terror warnings ahead of this holiday weekend. security has been stepped up. also we're told outside of the white house and also it is being extended for blocks. let's go straight to jeff zeleny on the scene. jeff? >> reporter: good morning, poppy. you're right. it is still very much an active situation here as you can see. we're on m street southeast in washington, d.c. you can see behind me the navy yard is a couple blocks in the distance. the police presence is as high as it was more than an hour ago when we first arrived on seen. but there's no confirmation that there was a shooter inside. there were just reports of a shooter inside. you can see by the response here how on edge this city is and in fact how on edge the country is