francesco costelli >>> german chancellor angela merkel says eu nations are well united and prepared for brexit talks. in a speech this morning she also promised to put climate change at the top of the agenda for the g20 summit which takes place in jergermany next month. >>> the department of homeland security has laid out new measures for an in-cabin laptop ban. tom costello has the details >> reporter: the new security steps being phased in this summer will affect 2,000 flights every day coming from 105 countries. every flight to the u.s. from abroad the new procedures could include more thorough carry-on bag checks, more bomb-sniffing dogs, more swabbing for explosives and eventually next-generation bag screening technology >> unless we all raise our security standards, terrorists who see commercial aviation as the greatest takedown, will find and attack the weakest link. >> reporter: the new measures come after u.s. intelligence determined isis has found a way to smuggle explosives into laptop computers since march, passengers coming from ten middle east and african airports have bee