Oil slips on rising coronavirus cases, returning Libyan supplies

NEW YORK (Reuters) - Oil prices slipped on Tuesday amid rising COVID-19 cases and a possible return of Libyan oil production, which has slowed to a trickle since the start of the year.The more-active September contract for Brent fell 0.3% to $41.70 a barrel by 11:41 a.m. EDT (1541 GMT), paring Monday's 92-cent gain. The August contract , which expires on Tuesday, fell 51 cents, or 1.2%, to $41.20.U.S. crude was down 5 cents, or 0.1%, at $39.65 a barrel.Coronavirus cases continue to rise in..