we thank you all, stephen brock, mo canady, dewey cornell, thank you. >> warner: still to come on the newshour: a temporary path for young immigrants; shields and brooks; and egypt's coming vote on a new constitution. but first, the other news of the day. here's hari sreenivasan. >> sreenivasan: the u.s. will send patriot missiles, along with 400 troops, to turkey to protect against possible syrian missile attacks. the troops and missiles will be a part of a larger nato force that includes german and dutch troops as well. defense secretary leon panetta announced the new moves at an air force base in turkey. >> we are deploying two patriot batteries here to turkey along with the troops that are necessary to man those batterees so that we can help turkey have the missile defense it may very well need in dealing with threats that come out of syria >> sreenivasan: a number of syrian shells have landed in turkish territory since the conflict in syria began in march of 2011. the environmental protection agency announced much tighter new rules for soot pollution today. the agency is limiting