The Pentagon took another step toward open intervention once again in the Indochina war when it doubled its airlift of supplies to the Lon Nol regime February 15.
The Khmer Rouge insurgents have now virtually blockaded the Mekong River, Pnompenh’s main supply line. For the first time in the war, they have mined the river. They have also stepped up heavy artillery fire from the banks, which are almost totally under their control.