some cases last not one or two but three or four hours. earlier this week, the president admitted his team is behind the eight ball on testing. >> not enough, it's clearly not enough. had i known, we would have gone harder, quicker if we could to. >> to make matters more complicated, the fda on tuesday expressed concerns about effectiveness of rapid test, no swab test that results in minutes. according to early data, those tests are less effective in detecting oma cron. meanwhile, the president is under increasing pressure to make a decision about whether he will mandate vaccines for the millions of people who get on a plane or train to travel. after a brief walk on the beach tuesday with the first lady and his new commander, the president was asked about travel vaccine mandates.