But development of weapons designed to be able to overcome defense systems has been slow and has faced costly failures.
In recent years, the field of vaccines for diseases such as Human Immunodeficiency Virus (HIV) which take a heavy toll in developing countries has faced major failures.
NATO has faced criticism for its failure to capture Dr. Karadzic, as well as Ratko Mladic, the former Bosnian Serb military leader, both of whom were charged with genocide and other war crimes in 1995.
The report is a blow for the head of the commission, Jenny Watson, who has faced criticism for the failure to launch thorough inquiries into electoral fraud and for the commission's problems in overseeing the last general election.
President Barack Obama also paid tribute to her life and promised to "bring justice to the terrorists" responsible for her captivity, but the US has faced criticism over its failure to free her and role in the coalition air strikes that allegedly killed her.
"The Prime Minister has faced criticism over his failure to keep his 2010 pledge to cut net immigration to below 100,000.
Campaigners have staged daily rallies in the capital, Abuja, to maintain pressure on the government and the president, Goodluck Jonathan, who has faced mounting criticism for the failure to secure the girls' release.
Gov. George W. Bush's readiness to assume the presidency should indeed be judged on his "experience" as Texas governor and as a private-sector executive who has faced a measure of both failure and success (editorial, May 7).
In Britain, Prime Minister Tony Blair has faced increasing heat over the failure to find weapons and mounting questions over whether the intelligence information on Iraq's programs was exaggerated to create support for the war.
The Turkish government has faced severe criticism over its failure to identify and arrest possible Islamist attackers, and both Kemal Kılıçdaroğlu, leader of the main opposition Republican People's party, and Selahattin Demirtaş, co-chair of the leftist Peoples' Democratic party, have claimed that the government was responsible for the Ankara attack.
