In success and in suffering, the American stake in Viet Nam last week continued to mount. Items:
> U.S. Air Force F-105 fighter-bombers for the first time struck north of the "Hanoi line." In five separate raids, they hit a major military base and ammunition depot at Sonla, 125 miles northwest of Hanoi and only 80 miles from the Red China border. Result: more than 70 buildings destroyed, nearly 50 others damaged. Other targets were Ban Nuoc Chieu, 80 miles northwest of Hanoi, and Nasan, 115 miles northwest of the capital, where 18 attacking planes blasted airfield runways, destroyed two buildings...