sentences:  In addition, the dedicated team supports LHC by assisting with humanitarian aid and relief works projects and through raising awareness about the current humanitarian crisis in and around Libya.Challenger Limited, one of the leading drilling, workover, and oilfield services companies in the region, operates throughout North Africa and the Gulf region.Acquired by Tatanaki in 1991, Challenger currently owns and operates a fleet of 30 rigs and has worked with major energy corporations including Total, Marathon, and Verenex.