(February 22, 2024, 1:34 PM EST) -- WASHINGTON, D.C. — A Luxembourg investor filed a petition in District of Columbia federal court seeking to enforce an International Centre for Settlement of Investment Disputes (ICSID) award of more than 5.1 million euros and $387,000 issued more than 10 years ago against the Republic of Niger for harming its investment in operating a Nigerien airport....