fire officials said that further testing is being done on a mailbag that set off a screening machine. officials said two employees were potentially exposed to the nerve agent. they re still at the facility and are being monitored but they re not showing any signs of eggs exposure. officials say more tests are due back this morning. 5:47. a check on cnn business this morning. taking a look at markets around the world. european markets opened mixed as trading begins there. on wall street, the post g20 cheer could be starting to fade. stocks ended on monday. the dow closed up 117 points and s&p 500 had an all-time closing high of 294 poi$294.64. pain at the pump in time for