The two people said the board's view that the offer is too low is backed by a fairness opinion provided by investment banks on behalf of the Duesseldorf-based company. One person noted that the offer doesn't reflect the real value of the company and added that Demag Cranes could revise its full-year outlook as business has picked up in recent weeks. It remains uncertain, however, if Terex would consider raising the EUR41.75 a share offer after Chief Executive Ronald DeFeo was quoted in a recent media interview as saying that he would "rather not have Demag (if it means) having to pay too much." Demag's m "The list of targets just grows and grows." Lockheed Martin Corp. said in a statement Saturday that it detected the May 21 attack "almost immediately" and took countermeasures. "Our systems remain secure; no customer, program or employee personal data has been compromised," the Bethesda, Md.-based company said. Neither Lockheed Martin nor federal agencies would reveal specifics of the attack, or its origins. Company spokeswoman Jennifer Whitlow declined to comment further on the case Sunday. This isn't the first time Lockheed Martin has been targeted. Nearly four years ago, officials revealed that hackers had breached Lockheed's Joint Strike Fighter program. Officials said no classified information about the military program was compromised, but heightened protections were added. Analysts said the latest attack would likely spur rival defense contractors like Northrop Grumman Corp., Raytheon Co., General Dynamics Corp. and Boeing Co. to take additional steps to safeguard their systems. "I guarantee you every major defense contractor is on double alert this weekend, watching what's going on and making sure they're not the next to fall victim," Shaul said. Boeing declined to comment on the company's network security measures. Northrop Grumman spokesman Randy Belote said in an e-mailed statement that "we do not comment on whether or not Northrop Grumman is or has been a target for cyber intrusions," adding that the company "continuously monitors and proactively strengthens the security of our networks." Over the past several years, the U.S. government has become more aggressive in its efforts to tackle cybercrime, developing strategies to beef up government computer systems, expand cooperation with other countries and improve coordination with the private sector. President Barack Obama declared cybersecurity a top priority shortly after taking office in 2009, setting off several government-wide reviews to develop strategies to better secure government, business and public online activity. The Pentagon last May set up a new Cyber Command, based alongside the National Security Agency at Fort Meade, Md., in recognition of the expanding threat against the Defense Department and the need to better coordinate the nation's offensive and defensive cyber operations. The Department of Homeland Security is also slowly employing an automated system — known as Einstein 2 and Einstein 3 — to protect government agencies' computer systems. Still, the attacks have continued. William J. Lynn III, the deputy defense secretary, said in January that more than 100 foreign intelligence agencies have tried to breach U.S. defense computer networks, largely to steal military plans and weapons systems designs. China is often pointed to as a source of cyber attacks because a large amount of malware, or malicious software, originates from there. The government denies it is involved but experts say the high skill level of some attacks suggests the Chinese military, a leader in cyber