June 1, 1970

WASHINGTON, May 31— The Securities and Exchange Commission, long noted as one of the most vigorous and ef fective agencies in the entire Federal Government, has lost its zest.

Benson, in announcing decision to allow dollar to 'float freely' in world currency mkt, holds that resulting cheaper imports and higher-priced exports, which will have anti-inflationary effect, is secondary aim of decision

S Vietnamese troops open offensive aimed at trapping N Vietnamese regiment SE of Pnompenh

UAR jets strike Israeli positions opposite Qantara and El Cap, Suez Canal northern sec, to follow up 2 of most successful UAR commando ambushes ever; claim direct hits on bunkers and ammunition dumps; Al Ahram calls commando attacks part of 'new stage' in war; attacks were coordinated with arty fire to hamper Israeli support and rescue operations; underline Israel's inability to halt commando crossings through retaliatory use of air force; UAR repts 2 Israeli planes downed by AA fire along canal northern sec; Israel confirms 13 soldiers killed, 4 wounded and 2 missing in attacks at canal, heaviest losses inflicted by UAR since war; confirms suffering casualties in guerrilla ambush of army patrol N of Jericho, Jordan Valley; E Jerusalem shops reopen after 1-day strike against Israeli occupation; Israel repts soldier wounded in UAR air attack in northern sec of canal; repts UAR plane was hit by AA fire, but was not seen to have fallen; resumes regular bombing of UAR canal positions; maps

Peru: Quake, measuring 7.75 on Richter scale, causes extensive damage and many deaths in towns ranging from Iquitos in north to Mazca in south; AP repts 200 killed, with city of Huaras hardest hit; quake is believed strongest since Oct '67 disaster; list of cities affected, casualties; map