With more than a billion users, Facebook is not only the biggest global social network but also an increasingly important forum for journalists. In some repressive countries it has even served as a publishing platform for journalists whose newspapers or news websites have been closed down. That is why journalists and bloggers should note today's news that after a year of standing on the threshold, Facebook has decided to step inside the Global Network Initiative tent.

Police arbitrarily arrested Michael Koma, the managing editor of South Sudan's daily Juba Monitor, on May 2 and detained him for four days following the publication of an article critical of the deputy security minister. A veteran journalist, Koma has experienced firsthand the poor state of press freedom within Africa's newest country. CPJ spoke with him briefly this week.

Dear President Salva Kiir Mayardit: We are writing to express our deep concern about the deteriorating state of press freedom in your country. In the past six months, CPJ has documented several cases of attacks, intimidation, and detention of journalists by security agents in South Sudan and we are concerned that this harassment has led to self-censorship and even exile among the local press corps. We urge you to use the power of your office to ensure that journalists are allowed to work freely without harassment and censure from state security officials.

Nairobi, May 21, 2013--Ugandan police surrounded the Kampala offices of two private newspapers for seven hours on Monday, barring access to the premises, disabling printing presses, and effectively halting publication indefinitely, according to news reports. The police said they had search warrants to find documents related to a letter written by an army official that described an assassination plot.

Dear Mr. Secretary: We are writing to bring to your attention the deteriorating state of press freedom in Ethiopia, where you will attend this year's African Union Summit. A vibrant press and civil society is fundamental to hold governments accountable and to ensure long-term development and stability. As we mark the 50th anniversary of the founding of the Organization of African Unity, we ask that you include the issue of press freedom in your discussion of the challenges that Africa will face in the next half-century.

New York, May 15, 2013--Ethiopian police in Addis Ababa questioned an editor for several hours today in connection with a story published in October about the widow of the late Ethiopian leader Meles Zenawi, according to news reports.

The working environment for journalists and media workers in Kenya is increasingly hostile, with at least 91 percent of journalists at local media outlets having faced security threats in the course of their work, a new study has revealed. The harassment of and attacks against journalists, with nearly 40 percent coming from politicians, indicates a need for urgent attention from both state and non-state actors if press freedom is to be guaranteed in the country.

While Uganda's politicians and social media are abuzz over a sensational letter reportedly written by a top security official about a high-level assassination plot, police have dutifully harassed the mainstream press in a bid to suppress the chatter.

Most governments, even repressive ones, at least give lip service to supporting freedom of the press--especially on World Press Freedom Day, May 3. But in Liberia this month, Othello Daniel Warrick, President Ellen Johnson Sirleaf's chief security aide, shocked local journalists by threatening them and calling them "terrorists" at a public event to mark the occasion, according to news reports and local media groups.

New York, May 13, 2013--The Committee to Protect Journalists condemns the closure of an independent radio station on April 22 in retaliation for its broadcast of an interview that authorities said incited secessionism.