US offers $1bn to Colombia on new right-wing president's first day of office BBCColombia's new president vows to remake the country — and challenge rebel groups NPRUS says it plans $1 billion security assistance to government of Colombia's new leader ReutersColombia’s new president takes office in ceremony in Cali highlighting hard line on armed groups AP NewsTrump Administration Fast-Tracks Military Partnership With Colombia to Target Drug Traffickers nytimes.com