the surprising hours' long delay of vice president kamala harris's flight to vietnam, as the u.s. embassy dealt with two new cases of that mystery illness known as havana syndrome andrea mitchell joins us now andrea, this is very unusual. >> that's right, lester it was a last-minute delay on the vice president's high-profile trip to vietnam after embassy staffers reported acoustic symptoms similar to the so-called havana syndrome over the weekend. at least one to be medevaced for treatment. security officials decided there was no threat to the vice president since th embassy staff was working at home due to covid. nbc reported as many as 200 reported cases at posts all over the world of a still mysterious ailment three hours late, vice president harris arrived in hanoi where we are told she'll be carrying out her full schedule lester >> andrea, thank you with cases of the delta variant of covid rising, americans are once again cutting back on travel, and hawaii is telling residents of the other 49 states, don't come here