updated 04/19/2013 AT 3:00 PM ET
•originally published 04/19/2013 AT 1:45 PM ET
In an unprecedented closure of a major American city, police locked down Watertown, Mass., Friday in a hunt for Dzhokhar Tsarnaev, 19, the second suspect in Monday’s horrific Boston Marathon bombing.
The first suspect, Tamerlan Tsarnaev, 26, was killed overnight as Boston police swept through the quiet town and a nation sat in shock, watching their television sets – and their Twitter feeds, where residents posted shocking photos of SWAT teams in their front yards, bullet holes in their living rooms, and armed vehicles rolling through the sleepy suburban streets.
WARNING: Graphic images and language follow