washington u.s. secretary state rex tillerson call unity understand first day state department amid internal dissent policies president donald trump also antagonize range ally within hours start job tillerson reach phone counterparts mexico canada speak phone israeli prime minister benjamin netanyahu meet german foreign minister sigmar gabriel department officials say hundreds state department officials greet former exxon mobil corp xom.n chief executive applause enter build loud cheer break tillerson thank act secretary state tom shannon stand departure john kerry hi new guy say tillerson swear wednesday senate confirm post despite concern tie russia trump call close relations russian president vladimir putin remark touch foreign policy specifics tillerson address dissent within department emerge week memo sign 900 officials protest trump decision suspend u.s. refugee program restrict travelers seven muslim-majority countries one great challenge thrill state department staff decide confront change condition every corner world say tillerson encourage use natural well-developed skills adapt change home well know hotly contest election feel way outcome say tillerson us entitle expression political beliefs let personal convictions overwhelm ability work one team also signal would impose change improve function department say security diplomats priority readout meet gabriel state department although discussions likely focus nato alliance future iran nuclear agreement trade separate phone call foreign minister canada mexico coincide trump say thursday want early talk north american free trade agreement want renegotiate repeal know excite opportunity work mexican foreign minister luis videgaray say interview cnn thursday even add would meet tillerson shortly two meet couple time videgaray finance minister tillerson exxon say tillerson also speak phone netanyahu state department say statement say whether discuss white house statement say israeli settlements occupy territories may helpful achieve peace palestinians adopt measure tone previous pro-israel announcements conversations secretary tillerson stress america steadfast commitment key ally partner work protect interest safety american people act state department spokesman mark toner say statement tillerson inherit messy globe war syria iraq nuclear-armed north korea threaten launch intercontinental ballistic missile increase violence eastern ukraine past 48 hours foreign policy challenge pile tensions erupt unite state ally australia exist refugee swap trump call dumb deal strain iran also increase white house say put tehran notice test-firing ballistic missile new administration move impose sanction several iranian entities friday accord source familiar matter tillerson first day address dissent call mexico canada