News At Seven-Thirty highlights: employees and employers urged goverment to clarify the guidelines for minimum wage; U.S. will end combat operations against Libya on Sunday; Syrian security forces killed at least 3 protesters; 5 people were killed during protest in south Afghanistan; a Southwest Airlines flight made an emergency landing; York Chow admitted obstetric services reach full capacity; Immigration Department is speeding up approval of work visas for applicants from Japan; Daya Bay plant seeks to allay fears; construction of the new Heung Yee Kuk building has completed; an April Fool’s joke claimed the royal wedding was bumped up one month earlier.