walter lubcke, who was head of the city council in kassel, was found dead in his garden last saturdayn shot in the head. reports suggest a younger man, who knew mr lubcke, has been taken into provisional custody. the us president, donald trump, has been celebrating his deal with mexico, designed to reduce the number of migrants crossing the border into america. he had threatened to impose trade tariffs if there was no agreement. in a joint declaration, the two countries said mexico would take unprecedented steps to curb irregular migration and human trafficking. the latest data shows more than 132,000 arrests were made on the us border in may, the highest in more than a decade, and a 33% increase from april. it was also the highest monthly total since mr trump took office. many of the migrants come from central america, as the bbc‘s will grant reports. porous, jungled, and nearly impossible to police. every day people move back and forth across the suchiate river, mexico's natural border with central america, on inflatable rafts. many cross for work, commerce, even school. but for us