Yanks Build Second Korean Defense Line Korean S])eeial Repoi't I5v i'.OiS I'OO.S WITH U'..S. 7T11 DIVISION,! Ivoiva (.\P) - Soldiers of the: r.S. 7(li Dixi.sjon ai'e earrNan^i <nit with l)icl\s, shovels, airliam-i mers and (iul/doz (-'rK a new con-' CI'])! of defense aiaunsl a reiieal 111 the 195(1 ComnuinisI iii\-asion (il South Korea. t.'nl.il lairlv reeeiill.x, most, lailli in defense aL ,'ainst another! invasion was iilaeed on a series! of fortiliealions sti'unt; alon.u the ini-mile-w ide Korean demililar- ized zone, niassixo U.S. aeriiil relalialion and thi' lioped-for e.liility of the Korean army and tile li.S. 2nd and 7th divisions to (onttun the Communists along' the Imjin Itiver near the DMZ. No one has ever oflieially ad- )n)tted ji, hut il Nnith Koi'eans i -raeked tlie defensive lino and I anie sneaniint; down the 20- nuli'-wide corridor tliat is the ( l.issic iinasioii roiit(> to the South. Ihe allic 'S would prolialily 'I'KU 'e to lall haek ruid di'^' in on tihe .south hank oi the Han liiv- As one mililary oliserver un-' devslaled it : "This is not nartic-; ularly appealini; to the Koreans: as Si .'oul is on tlie )>oilh lianl;." | A t ,'00d portion of the capital's four million citizens remember lii50 when the Communists overran Ihe "Special City" as they call it and came close to conquering,' all South Korea. The new concept was apparently inspired by the January eiisis wlien a team of North Korean a<;ents tried to kill President Chun.t; Hee Pai'k. Tvvo daysj later Noith Korean gunboats captured the U.S. intelligence ship Puehlo. This idea calls for a second massive line of fortifications across Ihe Seoul corridor about 21) miles north of the capital. It is called the Papa Line. Work started on it in earnest in June and a considerable amount of the bunkers have l).cen finished. I-Nentually. the whole systemi will ho linked by a series oil trenches, both for defense and lor communications. Jusi how near completion it is icniains classified information: hut officers say they are; pleased wilh jn'ogress. The line, no matter howj stront^ it will be—and it will bej a. massive series of in-depth forts—is not the sole hope for Ihe defense of South Korea.