talk about this more about the union rebuilding of the southside railroad between petersburg and brookvillethey did that in a period of nine days. and henry young. maybe a couple of things chris may want to address. chris: to go along with what you mention about the union army and the southside railroad to burkville, that is 60 miles. those of us who are where road -- are railroad buffs know it is separated by a gauge. the southside railroad, the two rails were five feet apart. the rolling stock had to fit that. the army railroad that tracy talked about, the military railroad, the engines and cars were four foot eight and a half. they had the line open from burkville for 60 miles. all the major union hospitals were over at city point. burkville became a major hospital center. eventually they can be placed on train cars and sent back to petersburg. one other thing of interest about this campaign overall, if you think about the fighting in virginia through the four years of war, most of this runs from washington to fredericksburg richmond to petersburg. most of which are cities that are on th

brookville sa brag ga reports one of them was american. >> reporter: flowers and yellow ribbons mark the maryland home of dr. warren weinstein one of two hostages killed in a u.s. drone strike. >> i profoundly regret what happened. on behalf of the united states government, i offer our deepest apologies. >> reporter: the drone strikes were conducted in january along the pakistan-afghanistan border. the operation targeting an al qaeda compound. he was an aid worker captured in pakistan and held by al qaeda since 2011. also killed was an italian held hostage since 2012. the president said the u.s. did not know hostages were being held at the compound. >> i cannot begin to imagine the anguish that the weinstein and lapore tow families are enduring today. i realize that there are no words that can ever equal their loss. >> reporter: the obama administration is conducting a review of the strikes. the weinstein family said, we look forward to the results of that investigation but those who took warren captive over three years ago bear ultimate responsibility. the family also blamed the pak