One week before the Brussels terrorist attacks, a Saudi-led coalition bombed a market in Mastaba, Yemen. Although more people died in Mastaba than in Brussels - 106 versus 34 - the media and the international community in general ignored that earlier atrocity, as they've ignored most of the 150 indiscriminate aerial attacks reported by the United Nations and Human Rights Watch in the last year. The West is actually supporting - by way of arms and military assistance - this all-but-invisible war. The Saudis are violating international law as they carry out attacks [on] schools, hospitals, markets and homes, [which] account for 60% of the 3,200 civilians killed in the conflict. The U.S. and Britain are ... the lead providers of the Saudi coalition's arsenal. Saudi Arabia has ... contracted for at least $20 billion in weapons from the U.S. and almost $4.3 billion in weapons from Britain in 2015. Many human rights and humanitarian organizations, as well as the European Parliament, have called for an embargo on arms sales to Saudi Arabia. What remains unknown is the exact nature of the U.S. and British military role in the Saudi campaign. The U.S. Defense Department has vaguely stated that it is providing "targeting assistance," which as a matter of law means it is liable for unlawful strikes in which it takes part. Member states of the U.N. Human Rights Council attempted to pursue ... an investigation [into unlawful airstrikes in Yemen], but the Saudi-U.S.-Britain trifecta effectively quashed it.